Weather Alert Watch
Severe Extreme Heat Warning

Extreme Heat Warning for District of Columbia; Frederick; Carroll +31 more

What: For the first Extreme Heat Warning, dangerously hot conditions with heat index values up to 112 expected. For the second Extreme Heat Warning, dangerously hot conditions with heat index values up to 113 expected. Impacts: Heat related illnesses...

DC, MD +1District of Columbia; Frederick; Carroll; Northern Baltimore; Cecil; Southern Baltimore; Prince Georges; Anne Arundel; Charles; St. Marys; Calvert; Northwest Montgomery; Central and Southeast Montgomery; Northwest Howard; Central and Southeast Howard; Northwest Harford; Southeast Harford; Albemarle; Greene; Madison; Rappahannock; Orange; Culpeper; Fairfax; Arlington/Falls Church/Alexandria; Stafford; Spotsylvania; King George; Northern Fauquier; Southern Fauquier; Western Loudoun; Eastern Loudoun; Northwest Prince William; Central and Southeast Prince William/Manassas/Manassas Park

Official alert brief

WHAT

For the first Extreme Heat Warning, dangerously hot conditions with heat index values up to 112 expected. For the second Extreme Heat Warning, dangerously hot conditions with heat index values up to 113 expected.

WHERE

DC, and portions of central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia.

WHEN

For the first Extreme Heat Warning, from 10 AM this morning to 8 PM EDT this evening. For the second Extreme Heat Warning, from 10 AM to 8 PM EDT Friday.

IMPACTS

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

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.