NWS / NOAA weather: Extreme Heat Warning issued July 27 at 3:02AM CDT until July 27 at 9:00PM CDT by NWS Chicago IL

* WHAT...For the Extreme Heat Warning, dangerously hot conditions
with peak heat index values 110 to locally over 115 degrees
expected. For the Dense Fog Advisory, visibility less than one
quarter mile in dense fog.

* WHERE...Livingston, De Kalb, La Salle, Lee, Ogle, Winnebago, and
Grundy Counties.

* WHEN...For the Extreme Heat Warning, until 9 PM CDT this evening.
For the Dense Fog Advisory, until 8 AM CDT this morning.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events. Low visibility could make
driving conditions hazardous.

Severity

Severe (4/5) · CAP Severe

This month

2000th Weather alert at severity 4+ in the last 30 days