Dangerous temperatures are once again the biggest weather headline across the U.S. on Tuesday, with more than 100 million people under heat advisories from the Plains up into the Northeast.
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Many big cities will be reaching 100 degrees or higher, with the added humidity making it really difficult to be outside for a great length of time.
Heat alerts across the U.S. through Tuesday night (Credit: Fox News)
Some areas across the upper Midwest, the Great Lakes and Ohio Valley will feel some relief as a cold front moves through the region.
Storms over the Great Lakes (Credit: Fox News)
That front will bring some thunderstorms and the risk of flash flooding.
The threat of flash flooding in the Southwest. (Credit: Fox News)
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Heavy rain with isolated flash flooding will be possible over the Southwest and Great Basin, as the monsoon season is still in full swing.
