Maryland is facing a hot and steamy end of the week as thunderstorms linger in the forecast and projections for the heat index possibly spiking as high as 105 degrees amid a “humid, and unstable atmosphere,” according to the National Weather Service.

The service issued a heat advisory Thursday that will go into effect at 11 a.m. and end at 8 p.m.

It also said the scorching temps will likely be accompanied by continued thunderstorms that can bring heavy rain, 60 mph winds, and potential hail about an inch in diameter in the afternoon and evening hours.

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“Consider each of the threats individually,” said Jeremy Geiger, a meteorologist for NWS. “Be aware in the afternoon that if storms come through, you may need to take shelter inside.”

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Maryland recorded its first heat-related death earlier this year in late May.

The city implemented a Code Red for Thursday and Friday ahead of the rising heat in Maryland. The city has about 14 cooling centers, all of which will be open.

Baltimore health department officials provided the following tips for staying cool.

  • Stay hydrated. Drink plenty of water throughout the day, before feeling thirsty.
  • Avoid direct sun and peak hours. Stay indoors between 10 a.m.-4 p.m., if possible. Stay in the shade when outdoors.
  • Plan travel and appointments during cooler times. Schedule appointments in the morning or evening when it’s cooler.
  • Wear lightweight, light-colored, breathable clothing.
  • Rest often and avoid heavy activity.
  • Avoid alcohol and caffeine.
  • Seek relief from the heat in air-conditioned locations.
  • Take a cool shower or place a cool, damp washcloth around your neck or wrists. Avoid using fans in closed rooms or rooms with temperatures in the mid-90s or higher.
  • Check on older adults and the sick in your community who may need help in the heat.