Blazing sun and oppressive humidity sent the heat index soaring to dangerous levels Thursday, Storm Team4 said.
Thursday's high reached the mid-90s. With the humidity, the heat index reached 106 degrees Thursday afternoon. It was 104 in D.C. at 4 p.m.
"The heat index tells you how it feels outside in the shade," the Maryland Department of Health and Mental Hygiene says on its website. "The heat index is a measurement of how it feels when relative humidity is combined with the effects of the air temperature."
Storm Team4 declared Thursday a Weather Alert Day.
A heat advisory went into effect for the I-95 corridor to the east at noon Thursday, Storm Team4 Chief Meteorologist Doug Kammerer said.
Strong storms are also possible Thursday evening.
With heat indices this high, you can get a sunburn in just 10 minutes, Storm Team meteorologist Sheena Parveen said.
Local
Washington, D.C., Maryland and Virginia local news, events and information
Road Trip! 10 Places to Cool Off Within 100 Miles of DC
But there is some good news: The temperature is expected to drop slightly Friday, and fall into the 80s over the weekend. Storm Team4 declared Friday a Weather Alert Day as strong storms are likely.
Until then, here are some ways to avoid heat-related illnesses:
- Drink plenty of water and avoid drinks that have a lot of caffeine or large amounts of sugar.
- Keep cool indoors.
- Wear lightweight, light-colored clothing and apply sunscreen.
- Avoid excessive physical activity, especially midday.
- Do not keep children or pets in cars.
- Find more tips here.
