An excessive heat warning is in effect throughout most of Delaware through Wednesday, June 23. The heat index for most of Delaware will hit 100 degrees or higher for much of this week.

The National Weather Service issued an extreme heat warning for a second day as the heat index surpasses 100. See how hot it ...

With a heat wave causing excessive heat warnings in Delaware, you'll hear a lot about the heat index this week. What to know ...

Excessive heat warning & heat advisory CBS News New York Although not always the case, excessive heat warnings usually coincide with heat waves.

Temperatures soar up to 110 degrees while winds pick up and blow around wildfire smoke. Here's what to know about Redding weather through the weekend.

Local fire crews and health officials say staying hydrated and cool is critical right now, especially for those who take ...