Destructive storms, tornadoes across Midwest kill at least 21 people. Here's what to know
CBSN
Disastrous systems sweeping across the Midwest have left at least 21 dead, including nine people killed after a tornado sparked what authorities called a mass casualty event in southeastern Kentucky.
The storms were part of a weather system Friday that killed seven in Missouri and also spawned tornadoes in Wisconsin, left several hundred thousand customers without power in the Great Lakes region and brought a punishing heat wave to Texas.

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