ST. MARY’S COUNTY, Md. — The National Weather Service has issued a Heat Advisory in effect from 12:00 PM to 7:00 PM for Prince George’s, Charles, and Saint Mary’s and Calvert counties. Heat index values are expected to reach 105 to 109 in affected areas.
Forecasters warn that extreme heat and humidity may cause heat illnesses. Hot and humid conditions will persist into next week, with the hottest days expected Tuesday and Wednesday, July 29 and 30.
Hazards today include:
- Extreme heat and humidity
- Isolated severe thunderstorms
- Damaging wind gusts possible
- Risk of localized flash flooding
Precautionary actions:
- Stay hydrated and limit outdoor activity
- Wear lightweight, light-colored clothing
- Never leave children or pets in vehicles
- Take breaks in air-conditioned places
No spotter activation is expected at this time. Continue to monitor NWS alerts and local emergency updates.