NWS / NOAA weather: Extreme Heat Warning issued July 3 at 8:27PM EDT until July 3 at 9:00PM EDT by NWS Baltimore MD/Washington DC

* WHAT...For the Extreme Heat Warning, dangerously hot conditions
with heat index values 110 to 115 expected.

* WHERE...Portions of DC, central, north central, northeast,
northern, and southern Maryland, and central, northern, and
northwest Virginia.

* WHEN... For the Extreme Heat Warning, from 10 AM to 9 PM EDT
Saturday.

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

* ADDITIONAL DETAILS...Early morning low temperatures in the 70s and
80s combined with oppressive humidity will result in little to no
overnight relief. Prolonged excessive heat may impact power,
water, and transportation systems. Heat index values around 100
are possible again Sunday afternoon.

Source: NWS / NOAA weather.