Rapid Alerts

* WHAT...Dangerously hot conditions with heat index values as high as 105 expected.

* WHERE...Niagara, Orleans, Monroe, Wayne, Northern Cayuga, Oswego, Livingston, and Ontario Counties.

* WHEN...From noon Wednesday to 8 PM EDT Friday.

* IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.

* WHAT...Dangerously hot conditions with heat index values up to 108 expected.

* WHERE...Portions of northeast Kentucky, southeast Ohio, and central, northern, southern, and western West Virginia.

* WHEN...Until 10 PM EDT Friday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* ADDITIONAL DETAILS...An extended period of hot and humid conditions are expected, peaking on Thursday.

* WHAT...Dangerously hot conditions with heat index values up to 104 expected.

* WHERE...Much of central and eastern Iowa.

* WHEN...Until 10 PM CDT Wednesday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT...Dangerously hot conditions with heat index values up to 104 expected.

* WHERE...Portions of southern and southeast Iowa

* WHEN...Until 10 PM CDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

...The Flood Warning continues for the following rivers in Mississippi...Louisiana...

Pearl River Near Bogalusa affecting Washington and Pearl River Counties.

Pearl River Near Pearl River affecting Hancock, Pearl River and St. Tammany Counties.

For the Lower Pearl River...including Bogalusa, Pearl River...Minor flooding is forecast.

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Pearl River near Pearl River.

* WHEN...Until Monday evening.

* IMPACTS...At 16.0 feet, Lower portions of streets in River Gardens Subdivision will begin to flood. Secondary roads to the river and throughout Honey Island Swamp will remain inundated. Property in the vicinity of the gage is flooded threatening about 20 homes along the left bank. The Bogue Chitto National Wildlife Refuge will be closed to hunting at the 15.5 foot stage.

* ADDITIONAL DETAILS... - At 7:00 PM CDT Tuesday the stage was 15.7 feet. - Bankfull stage is 12.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 7:00 PM CDT Tuesday was 15.7 feet. - Forecast...The river is expected to rise to a crest of 15.8 feet tomorrow morning. It will then fall below flood stage early Monday afternoon. - Flood stage is 14.0 feet. - Flood History...This crest compares to a previous crest of 15.8 feet on 02/11/1936. - http://www.weather.gov/safety/flood

...The Flood Warning continues for the following rivers in Mississippi...Louisiana...

Pearl River Near Bogalusa affecting Washington and Pearl River Counties.

Pearl River Near Pearl River affecting Hancock, Pearl River and St. Tammany Counties.

For the Lower Pearl River...including Bogalusa, Pearl River...Minor flooding is forecast.

* WHAT...Minor flooding is occurring and minor flooding is forecast.

* WHERE...Pearl River near Bogalusa.

* WHEN...Until Saturday evening.

* IMPACTS...At 20.0 feet, Woodlands and crop acreage along the river will be flooded. The Bogue Chitto Wildlife Management area will be inundated with water in recreational camps and over access roads.

* ADDITIONAL DETAILS... - At 6:15 PM CDT Tuesday the stage was 20.4 feet. - Bankfull stage is 15.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 6:15 PM CDT Tuesday was 20.4 feet. - Forecast...The river is expected to fall below flood stage Saturday afternoon and continue falling to 10.5 feet Friday, July 10. - Flood stage is 18.0 feet. - Flood History...This crest compares to a previous crest of 20.4 feet on 04/08/1976. - http://www.weather.gov/safety/flood

* WHAT...Dangerously hot conditions with heat index values up to 106 degrees.

* WHERE...Portions of east central, south central, and southeast Wisconsin.

* WHEN...Until 7 PM CDT Wednesday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT...Visibility less than one quarter mile in blowing dust.

* WHERE...Thomas, Sheridan and Gove Counties.

* WHEN...Until 11 PM CDT this evening.

* IMPACTS...Severely limited visibilities are expected. Travel will be dangerous and possibly life-threatening.

* ADDITIONAL DETAILS...Visibility reductions are associated with storm outflow winds, be alert for sudden reductions in visibility.

* WHAT...For the Heat Advisory, heat index values up to 110. For the Extreme Heat Warning, dangerously hot conditions with heat index values of 110 or greater expected.

* WHERE...Portions of southeast Arkansas, northeast Louisiana, and central, north central, northwest, southwest, and west central Mississippi.

* WHEN...For the Heat Advisory, until 10 AM CDT Wednesday. For the Extreme Heat Warning, from 10 AM to 9 PM CDT Wednesday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.

* ADDITIONAL DETAILS...The threat for dangerous heat continues through the end of this week. Additional heat advisories may be needed.

The National Weather Service in Grand Junction has issued a Red Flag Warning for gusty winds, low relative humidity and dry fuels, which is in effect from noon to 8 PM MDT Wednesday.

* AFFECTED AREA...In Colorado, Fire Weather Zone 291 Northern San Juan Forecast Area and Fire Weather Zone 293 Gunnison Basin Forecast Area.

* TIMING...For the first Red Flag Warning, until 9 PM MDT this evening. For the second Red Flag Warning, from noon to 8 PM MDT Wednesday. For the Fire Weather Watch, from Thursday afternoon through Thursday evening.

* WINDS...Southwest 15 to 25 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...8 to 13 percent.

* IMPACTS...Fires will catch and spread quickly. Exercise extreme caution with any outdoor burning.

* AFFECTED AREA...In Colorado, Fire Weather Zone 205 Colorado River Headwaters below 8000 feet.

* TIMING...For the first Red Flag Warning, until 9 PM MDT this evening. For the second Red Flag Warning, from noon to 8 PM MDT Wednesday. For the Fire Weather Watch, from Thursday afternoon through Thursday evening.

* WINDS...Southwest 15 to 25 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...7 to 12 percent.

* IMPACTS...Fires will catch and spread quickly. Exercise extreme caution with any outdoor burning.

The National Weather Service in Lubbock has issued a

* Flash Flood Warning for... Northwestern Hall County in the panhandle of Texas...

* Until 915 PM CDT.

* At 709 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to 3 inches of rain have fallen. Additional rainfall amounts up to 1 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include... Brice.

* WHAT...Visibility around one quarter of a mile or less in blowing dust.

* WHERE...Wallace, Logan, Greeley and Wichita Counties.

* WHEN...Until 10 PM MDT /11 PM CDT/ this evening.

* IMPACTS...Severely limited visibilities are expected. Travel will be dangerous and possibly life-threatening.

* ADDITIONAL DETAILS...Visibility reductions are associated with storm outflow winds, be alert for sudden reductions in visibility.

The National Weather Service in Amarillo has extended the

* Flash Flood Warning for... Southeastern Donley County in the panhandle of Texas...

* Until 915 PM CDT.

* At 654 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 2 and 4 inches of rain have fallen. Additional rainfall amounts of 1 to 3 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include... Hedley and Lelia Lake.

* WHAT...Dangerously hot conditions with heat index values up to 104.

* WHERE...Portions of north central and northeast Iowa, southeast Minnesota and central, southwest and west central Wisconsin.

* WHEN...Until 7 PM CDT Wednesday.

* IMPACTS...Extreme heat and humidity will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.

The National Weather Service in Midland/Odessa has issued a

* Flash Flood Warning for... Northeastern Jeff Davis County in southwestern Texas... Southwestern Reeves County in southwestern Texas...

* Until 1000 PM CDT.

* At 657 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 0.5 and 1.5 inches of rain have fallen. Additional rainfall amounts of 0.5 to 1 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include... Balmorhea, Balmorhea Lake, Saragosa, Balmorhea State Park, Toyahvale and Verhalen.

The National Weather Service in Amarillo has issued a

* Flash Flood Warning for... Southwestern Donley County in the panhandle of Texas...

* Until 915 PM CDT.

* At 644 PM CDT, gauge reports indicated thunderstorms producing heavy rain across the warned area. Between 2 and 3 inches of rain have fallen. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Gauges reported.

IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include... Clarendon, Howardwick and Greenbelt Lake.

At 735 PM EDT, a severe thunderstorm capable of producing a tornado was located over Trenary, or 21 miles southwest of Munising, moving northeast at 20 mph.

HAZARD...Tornado and ping pong ball size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely.

This tornadic thunderstorm will remain over mainly rural areas of north central Delta and southwestern Alger Counties.

* WHAT...Dangerously hot conditions with heat index values up to 104 southwest Iowa.

* WHERE...Fremont, Montgomery, and Page Counties.

* WHEN...Until 9 PM CDT this evening.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

The National Weather Service in Marquette has issued a

* Tornado Warning for... North central Delta County in south central Upper Michigan... Southwestern Alger County in north central Upper Michigan...

* Until 800 PM EDT.

* At 714 PM EDT, a severe thunderstorm capable of producing a tornado was located near U.S. 41 between Trenary and Rapid River, or 27 miles north of Escanaba, moving northeast at 30 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without shelter. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely.

* This dangerous storm will be near... Trenary and U.S. 41 between Trenary and Rapid River around 720 PM EDT.

Other locations impacted by this tornadic thunderstorm include Forest Lake, Traunik, and Diffin.

The National Weather Service in Midland/Odessa has issued a

* Flash Flood Warning for... Southwestern Brewster County in southwestern Texas...

* Until 900 PM CDT.

* At 605 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 0.5 and 1 inch of rain has fallen. Additional rainfall amounts of 0.5 to 1.5 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include... Lajitas, Study Butte, Terlingua, Castolon, Big Bend National Park and Barton Warnock Environmental Educational Center.

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...Northwestern Glacier County in north central Montana...

* WHEN...Until 430 PM MDT Wednesday.

* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring.

* ADDITIONAL DETAILS... - At 429 PM MDT, local law enforcement reported ongoing flooding in the warned area. - Flooding impacts due to Swift Creek overflowing its banks will continue, but no additional rainfall is expected. - Some locations that will experience flooding include... Many Glacier and adjacent areas. - http://www.weather.gov/safety/flood

At 504 PM CDT, Doppler radar indicated thunderstorms have ended over the warned area. Up to 4 inches of rain have fallen. Flooding impacts will continue, but no additional rainfall is expected. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

Some locations that will experience flash flooding include... Lakeview.

HONOLULU – U.S. Pacific Fleet conducted training and testing exercises April 20-May 15, 2026, in the Pacific Ocean aboard decommissioned Tarawa-class amphibious assault ship USS Peleliu (LHA 5) and in port onboard Joint Base Pearl Harbor-Hickam (JBPHH). The training, which combined participation from several Navy commands, industry partners, and academic institutions, validated the Navy’s ability to rapidly return ships to the fight in contested environments.

The exercise commenced with controlled detonations conducted by NSWC Carderock Division and Explosive Ordnance Disposal (EOD) Mobile Unit (EODMU) 11 technicians aboard ex-Peleliu at sea to simulate damage. EODMU-11 and Mobile Diving and Salvage Unit (MDSU) 1 forces and engineers quickly responded to the detonations, initiated immediate damage control efforts, and assessed affected spaces.

“This training offered a unique opportunity to achieve a hyper realistic training environment for expeditionary forces to execute key afloat salvage and repair techniques,” said Lt. Cmdr. Nicolas Twisselman, MDSU-1 Salvage Officer. “Leveraging capabilities and experience from our counterparts to quickly respond to an incident, analyze the situation, and mitigate or dispose of the threat ensures fleet resiliency in contested environments.”

Following the initial damage control and analysis, EOD technicians conducted response drills to detect, locate, and render safe other explosive threats aboard ex-Peleliu. Once the spaces were deemed safe and clear, mobile diving and salvage forces initiated further expeditionary shipboard repair operations.

Emerging technologies were utilized throughout the training to ensure the U.S. Navy maintains cutting-edge capabilities to complete its mission. Predictive analytics, advanced visualization, forward manufacturing, and robotics were incorporated, accelerating the transition of innovative tools from the lab to the fleet.

“Our participation in the exercise allows us to apply our expertise in platform integrity and signature management to provide a ballasted, safe vessel capable of sustaining real-world damage scenarios and supporting critical training. By providing world-class, cost-effective, and groundbreaking technical solutions at sea and in the field, we ensure our warfighters maintain their technological superiority and operational readiness," said Michael Kipp, NSWC Carderock.

Upon conclusion of the at-sea portion of the training, ex-Peleliu was towed back to JBPHH for additional in-port damage repair training, led by Naval Sea Systems Command (NAVSEA). Highlighting strong partnership between the U.S. Navy and the industrial base, the training brought together Sailors, government civilians, and experts from dozens of companies and universities.

The National Weather Service in Amarillo has issued a

* Flash Flood Warning for... Southeastern Donley County in the panhandle of Texas...

* Until 715 PM CDT.

* At 425 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 0.5 and 2 inches of rain have fallen. The expected rainfall rate is 0.6 inches in 10 minutes. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include... Hedley and Lelia Lake.

Area has already seen significant rainfall in the last 24 hours, which can make locations more prone to flash flooding.

At 426 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to 3.5 inches of rain have fallen. Additional rainfall amounts up to 0.5 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

Some locations that will experience flash flooding include... Lakeview.

...CRITICAL FIRE WEATHER CONDITIONS EXPECTED FOR THE HIGH COUNTRY TODAY...POTENTIALLY CONTINUING THROUGH FRIDAY...

A warm and dry airmass will coincide with gusty west and southwest winds today. Sustained winds are expected to be 15 to 25 mph across much of the high country with gusts up to 40 mph, strongest for exposed areas and higher elevations. These conditions will drive very high fire danger across the warned area. Any new starts or established fires will likely spread rapidly under these conditions.

* AFFECTED AREA...Fire Weather Zones 211, 213, 217 and 218.

* TIMING...Until 9 PM MDT this evening.

* WINDS...Southwest 10 to 20 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...As low as 11 percent.

* IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire.

The National Weather Service in Lubbock has issued a

* Flash Flood Warning for... Northwestern Hall County in the panhandle of Texas...

* Until 600 PM CDT.

* At 353 PM CDT, Doppler radar indicated slow-moving thunderstorms producing heavy rain across the warned area. Up to 2.5 inches of rain have fallen. Additional rainfall amounts up to 1 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include... Lakeview.

* WHAT...Flooding caused by excessive rainfall continues.

* WHERE...Areas along Swiftcurrent Creek near Many Glacier in Glacier National Park.

* WHEN...Until 445 PM MDT.

* IMPACTS...Flooding and elevated flow of creeks and streams, and other low-lying and flood-prone locations is imminent or occurring.

* ADDITIONAL DETAILS... - At 236 PM MDT, Recent heavy rainfall has resulted in elevated flows on creeks and streams including Swiftcurrent Creek near Many Glacier. Additional precipitation is possible through Tuesday afternoon. - Creek levels are expected to slowly diminish towards the evening. - Some locations that will experience flooding include... Kiowa, East Glacier Park, East Glacier Park Village, the entire east side of Glacier National Park, Saint Mary, Babb, Many Glacier, Marias Pass and Goat Haunt.

...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 10 PM MDT WEDNESDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, AND 230...

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, AND 230...

* AFFECTED AREA...Fire Weather Zones 220, 221, 222, 223, 224, 225, 226, 227, 228, 229 and 230.

* WINDS...Southwest 15 to 25 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...As low as 5 percent.

* IMPACTS...Elevated fire danger is expected. Fires will catch and spread rapidly and erratically.

* WHAT...Flooding caused by excessive rainfall continues.

* WHERE...Southern Glacier County in north central Montana... Northwestern Pondera County in north central Montana...

* WHEN...Until 445 PM MDT.

* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring.

* ADDITIONAL DETAILS... - At 238 PM MDT, Gauge reports indicated ongoing flooding at Badger Creek below Four Horns Canal. Flooding is already occurring in the warned area. - This includes the following streams and drainages... Badger Creek, North Fork Whitetail Creek and Whitetail Creek. Additional rainfall amounts up to 0.5 inches are possible in the warned area. - Some locations that will experience flooding include... Mainly rural areas of Southern Glacier and Northwestern Pondera Counties.

* WHAT...Flooding caused by rain and snowmelt continues.

* WHERE...Western Glacier County in north central Montana... West Central Pondera County in north central Montana...

* WHEN...Until 515 PM MDT.

* IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring.

* ADDITIONAL DETAILS... - At 240 PM MDT, Satellite estimates and rain gauge data indicate heavy rain and snowmelt from thunderstorms in the warned area. Flooding is ongoing or expected to begin shortly. Between 2 and 4 inches of rain have fallen. - Additional rainfall amounts up to 0.5 inch are possible in the warned area. - Some locations that will experience flooding include... Kiowa, East Glacier Park, East Glacier Park Village, Saint Mary, Babb, Many Glacier, Marias Pass and Goat Haunt.

U.S. Marine Corps Forces, Pacific (MARFORPAC) is executing two major combined exercises across the First Island Chain this month, highlighting the utility of its "Two MEFs Abreast" strategy through the simultaneous conduct of Exercise Resolute Dragon 26 in Japan and Exercise KAMANDAG 10 in the Philippines.

* WHAT...Dangerously hot conditions with heat index values 105 to 110.

* WHERE...Portions of central, east central, southeast, and west central Illinois.

* WHEN...Until midnight CDT Thursday Night.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT...Dangerously hot conditions with heat index exceeding 105 to near 110 degrees through the mid week period.

* WHERE...All of southeast Michigan.

* WHEN...Until 8 PM EDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* ADDITIONAL DETAILS...An extended period of hot and humid conditions is ongoing and peaks Wednesday through at least Thursday. High temperatures reach the mid 90s to near 100 degrees and combine with high humidity to result in heat index of 105 degrees or greater each day. Little relief occurs at night as low temperatures only fall into the mid and upper 70s with nighttime heat index around 80.

* WHAT...Dangerously hot conditions with heat index values up to 110.

* WHERE...Portions of central, east central, north central, south central, southeast, southwest, and west central Indiana.

* WHEN...Until 8 PM EDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT...Dangerously hot conditions with heat index values up to 105-110F expected.

* WHERE...Portions of east central and northeast Kansas and central, north central, northeast, northwest, and west central Missouri.

* WHEN...Until 9 PM CDT Friday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* ADDITIONAL DETAILS...Several days of extreme heat will impact the region with poor heat relief during the overnight hours.

* WHAT...Dangerously hot and humid conditions with multiple days of heat index values of 100 to 110 expected, along with nighttime lows not falling below the mid to upper 70s.

* WHERE...In Illinois, Carroll, Jo Daviess, and Stephenson Counties. In Iowa, Benton, Jackson, Jones, Linn, Buchanan, Delaware, and Dubuque Counties.

* WHEN...Until 10 PM CDT Wednesday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT...Dangerously hot and humid conditions with multiple days of heat index values of 100 to 110 expected, along with nighttime lows not falling below the mid to upper 70s.

* WHERE...In Illinois, Bureau, Putnam, Henry IL, and Whiteside Counties. In Iowa, Clinton County.

* WHEN...Until 10 PM CDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT...Critical fire weather conditions expected. Southwest winds 15 to 25 mph with gusts up to 40 mph and relative humidity 7 to 18 percent.

* WHERE...East and southeast of Flagstaff, stretching along the Mogollon Rim and White Mountains, as well as northward into the Little Colorado River Valley. This includes portions of the Apache-Sitgreaves and Coconino National Forests.

* WHEN...Until 7 PM MST /8 PM MDT/ this evening.

* IMPACTS...Rapid spread and growth of any new or existing fires. Fires will have the potential to exhibit extreme fire behavior. Elevated potential for new fire starts.

* AFFECTED AREA...In Colorado, Fire Weather Zone 203 Lower Colorado River below 8000 feet.

* TIMING...Until 9 PM MDT this evening.

* WINDS...Southwest 10 to 20 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...7 to 12 percent.

* IMPACTS...Fires will catch and spread quickly. Exercise extreme caution with any outdoor burning.

The National Weather Service in Grand Junction has issued a Red Flag Warning for gusty winds, low relative humidity and dry fuels, which is in effect from noon to 8 PM MDT Wednesday. A Fire Weather Watch has also been issued. This Fire Weather Watch for gusty winds, low relative humidity and dry fuels is in effect from Thursday afternoon through Thursday evening. The Fire Weather Watch is no longer in effect.

* AFFECTED AREA...In Colorado, Fire Weather Zone 207 Southwest Colorado Lower Forecast Area, Fire Weather Zone 290 Paradox Valley Forecast Area, Fire Weather Zone 292 North Fork Forecast Area and Fire Weather Zone 294 Southwest Colorado Upper West Forecast Area. In Utah, Fire Weather Zone 491 Southeast Utah.

* TIMING...For the first Red Flag Warning, until 9 PM MDT this evening. For the second Red Flag Warning, from noon to 8 PM MDT Wednesday. For the Fire Weather Watch, from Thursday afternoon through Thursday evening.

* WINDS...South 10 to 20 mph with gusts up to 45 mph.

* RELATIVE HUMIDITY...5 to 10 percent.

* IMPACTS...Fires will catch and spread quickly. Exercise extreme caution with any outdoor burning.

* WHAT...Dangerously hot conditions with heat index values around 105 expected each afternoon.

* WHERE...Portions of central, east central, north central, and northeast Illinois and northwest Indiana.

* WHEN...Until midnight CDT /1 AM EDT/ Thursday Night.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* ADDITIONAL DETAILS...Dangerous heat expected to persist through Thursday. Thunderstorms may begin to bring some relief from the heat for portions of northern Illinois by Thursday afternoon or evening.

* WHAT...Dangerously hot conditions with heat index values up to 105.

* WHERE...Florence, Menominee, Northern Marinette County, Northern Oconto County, Southern Marinette County, and Southern Oconto counties.

* WHEN...Until 7 PM CDT this evening.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT...Dangerously hot conditions with heat index values up to 105.

* WHERE...Portions of central, south central, southwest, and west central Michigan.

* WHEN...Until 8 PM EDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* AFFECTED AREA...Fire weather zones 417, 418, 430, 431, 432, 433, 434, 435, 436, and 437.

* WIND...Winds 10 to 20 mph with gusts up to 30 mph. Winds will be west becoming south along the US-20 corridor, and south for the remaining areas of the High Plains further south.

* HUMIDITY...10 to 15 percent.

* IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended.

* ADDITIONAL DETAILS... While humidity will improve this evening, gusty and erratic winds along with a few strikes of lightning are possible with scattered shower activity through the evening hours. Outside of the central and southern Nebraska panhandle, this activity is unlikely to come with much, if any, rainfall.

* WHAT...Dangerously hot conditions with heat index values up to 105.

* WHERE...Portions of east central, south central, and southeast Wisconsin.

* WHEN...Until 7 PM CDT Wednesday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* WHAT...Dangerously hot conditions with heat index values up to 107 expected.

* WHERE...Portions of north central, northeast, and northwest Ohio.

* WHEN...Until 8 PM EDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. A prolonged period of dangerously hot and humid conditions with little overnight relief is expected through the week, which will increase impacts to vulnerable populations.

* WHAT...Dangerously hot conditions with heat index values up to 108.

* WHERE...Portions of south central, southwest, and west central Illinois and central, east central, northeast, and southeast Missouri.

* WHEN...Until 10 PM CDT Friday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.