Major flooding hits Montana, storms moving into heartland

Temperatures will be well over 100 degrees in Arizona this week.

An active jet stream moving in from the Pacific Ocean on Tuesday is bringing heavy rain and storms with it.

Another storm system moves into the Northwest and the northern Rockies on Wednesday delivering more rain and stormy weather.

The western storm will bring heavy rain to already-flooded Montana all the way to the Great Lakes by Friday and Saturday. The worst flooding in 37 years is forecast in parts of Montana.

More flooding is possible from the Rockies into the Northern Plains.

Widespread totals of 2 to 3 inches are expected with some areas getting more than 3 inches.

Heat continues in Southwest

Triple-digit heat continues for the Southwest on Tuesday -- and it's only going to get hotter.

An excessive heat watch has been issued for parts of Arizona and California as temperatures reach 105 to 110 degrees.

Las Vegas could reach 100 degrees for the first time this year today.