At 12:01 p.m. on Saturday, the National Weather Service issued a heat advisory valid for Sunday between 11 a.m. and 9 p.m.

The National Weather Service issued heat advisories for a large swath of the East Coast through much of the weekend.

At 2:23 p.m. on Saturday, the National Weather Service issued a heat advisory valid from Monday 11 a.m. until Tuesday 8 p.m.

The National Weather Service issued a heat advisory at 2:23 p.m. on Saturday valid from Monday 11 a.m. until Tuesday 8 p.m.

A heat advisory was issued by the National Weather Service on Saturday at 12:16 p.m. valid for Sunday between 10 a.m. and 5 p ...

On Saturday at 1:36 p.m. a heat advisory was released by the National Weather Service valid from Monday 11 a.m. until Tuesday ...

The advisory is in effect from 11 a.m. Saturday to 8 p.m. Sunday as a heat wave settles over the Southeast, the weather service said.

Orlando heat wave triggers Heat Advisory with temperatures reaching mid to upper 90's and heat index up to 110°F.

A heat advisory for the Hillsborough County area was expected to last until Monday, as temperatures could feel up to 109 degrees, weather forecasters said.

Much of the U.S. is under extreme heat warnings or advisories while New York, Philadelphia and Washington could feel like 100 degrees or more.