Extreme Heat Warning

Locations Affected

Washington, DC ∙ Baltimore, MD ∙ Alexandria, VA ∙ Rockville, MD ∙ Gaithersburg, MD ∙ Frederick, MD ∙ Bowie, MD ∙ Lake of the Woods, VA ∙ Syria, VA ∙ Brookeville, MD

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 1005 PM EDT Fri Jul 3 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM TO 9 PM EDT SATURDAY... * 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...From 10 AM to 9 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 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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.

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