High heat and humidity expand from the Northwest into the central U.S. and lower Mississippi Valley this week with temperatures in the high 90s to 100-degree range.
Thunderstorms with the risk of heavy rain continue over parts of the Southwest and California. Flood watches are posted.
Heat advisories currently in effect.
A front moving into the upper Midwest traveling across the Great Lakes will bring some strong to severe storms today and Tuesday.
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The national forecast for Monday, July 26.
The main risks will be strong winds, hail and isolated tornadoes.
Upper-level winds will push some of the smoke from wildfires into the Northern Tier of the country in the next few days.
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