Extreme Heat Warning for Washington; Shenandoah; Frederick +8 more
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. Impacts: Heat related illnesses increase significantly during extreme heat and high...
Official alert brief
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.
Instructions
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.