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A dangerous heat wave is the lead story on Wednesday, with temperatures soaring past record levels from Michigan to Florida.
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High humidity will make it feel oppressive with many cities passing the 100-degree mark.
California and Arizona are also experiencing extreme heat, with daytime high temperatures also getting into the triple digits.
Strong-to-severe thunderstorms will fire up across the upper Midwest and Great Lakes.
Several tornadoes along with hail, damaging winds and heavy rain could bring flash flooding.
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Another region of stronger storms will also threaten areas from the Interior Northeast and down into the Southeast.