NWS / NOAA weather: Extreme Heat Watch issued July 2 at 8:36AM EDT until July 4 at 8:00PM EDT by NWS Baltimore MD/Washington DC

* WHAT...For the first Extreme Heat Warning, dangerously hot
conditions with heat index values up to 111 expected. For the
second Extreme Heat Warning, dangerously hot conditions with heat
index values up to 112 expected. For the Extreme Heat Watch,
dangerously hot conditions with heat index values up to 110
possible.

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

* WHEN...For the first Extreme Heat Warning, until 8 PM EDT this
evening. For the second Extreme Heat Warning, from 10 AM to 8 PM
EDT Friday. For the Extreme Heat Watch, from Saturday morning
through Saturday evening.

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

Source: NWS / NOAA weather.