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On Wednesday at 1:55 a.m. a heat advisory was released by the National Weather Service valid for Thursday between 10 a.m. and 8 p.m. for Eastern Montgomery and Lower Bucks as well as Delaware and Philadelphia counties.

On Tuesday at 2:14 p.m. a heat advisory was released by the National Weather Service valid from Wednesday 11 a.m. until Thursday 10 p.m. for Passaic, Hudson, Bergen, Essex and Union counties.

The National Weather Service released a heat advisory at 11:14 a.m. on Tuesday valid for Wednesday between 10 a.m. and 7 p.m. for Lauderdale, Colbert, Franklin, Lawrence, Limestone, Madison, Morgan and Cullman counties.

The heat advisory includes parts of Delaware, Pennsylvania, New York, Connecticut and New Jersey, where two people died in flooding.

Yosemite is included in an updated heat advisory released by the National Weather Service on Tuesday at 6:34 a.m. The advisory is in effect until 11 p.m.

A heat advisory is in place for western and central parts of New York from 11 a.m.-8 p.m. Wednesday. The heat index values on Tuesday are forecast to reach levels near 95°F and several counties are expected to be affected.

Some parts of the Mid-South could see heat indexes of 110 this week. Here's how you can say safe in the extreme temperatures.