NWS / NOAA weather: Extreme Heat Warning issued July 3 at 12:30PM EDT until July 3 at 8:00PM EDT by NWS Baltimore MD/Washington DC

* WHAT...For the Extreme Heat Warning, dangerously hot conditions
with heat index values of 105 to 110 expected. For the Heat
Advisory, heat index values 100 to 104 expected.

* WHERE...Portions of north central Maryland, northwest Virginia,
and eastern West Virginia.

* WHEN...For the Extreme Heat Warning, until 8 PM EDT this evening.
For the Heat Advisory, from 10 AM to 8 PM EDT Saturday.

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

* ADDITIONAL DETAILS...Early morning low temperatures in the 70s
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 of 95 to 100
are possible again Sunday afternoon.

Source: NWS / NOAA weather.