Extreme heat is likely to break daily temperature records, but the weather forecast calls for a cool-down as August arrives.

Heat and humidity are stretching east from the Mississippi River valley, with heat indices topping 110F in some areas

Extreme heat is likely to break daily temperature records, but the weather forecast calls for a cool-down as August arrives.

With the jet stream positioned well to the north, hot and humid conditions are forecast for millions in the Northeast through Wednesday.