Heat Illnesses Threaten as Heat Wave Hits Prince George's

NWS forecasts heat index of up to 105 and warns that heat illnesses are possible.

The first day of summer is bringing with it a heat wave that has hit Prince George's County and much of the Northeast.

A National Weather Service (NWS) hazardous weather outlook shows a heat advisory in effect Wednesday and Thursday for Prince George's County and much of Maryland, Northern Virginia and Washington.

Heat illnesses are possible due to the combination of hot temperatures and high humidity, according to the NWS.

Be on alert, car interiors can reach lethal temperatures in a matter of minutes, the NWS states—urging against leaving children and pets unattended in vehicles.

Highs Wednesday are expected to be in the upper 90s to around 100 in Prince George's County with heat index values from 100 to 105 degrees, according to the NWS.

For Thursday, the forecast is no better, with highs in the upper 90s to around 100 expected, and heat index values around 105.

Late Thursday showers and thunderstorms are possible and will be more numerous ahead of a cold front on Friday, according to NWS. Its heat advisory ends 10 p.m. Thursday.

As the heat leaves Thursday and the thunderstorms roll in, the NWS warns that a few of the thunderstorms will be capable of producing locally damaging winds and gusts.

NWS Recommendations During A Heat Advisory

  • Drink plenty of fluids
  • Stay in an air-conditioned room
  • Stay out of the sun
  • Check in on relatives and neighbors
  • Take extra precautions if you work or spend time outside, when possible reschedule strenuous activities to early morning or evening.
  • Know the signs and symptoms of heat exaustion and heat stroke.
  • Wear light weight and loose fitting clothing when possible.


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