Dozens of tornadoes could erupt during severe storms in the U.S. this week, putting millions of people at risk.

The agency is responsible for tracking and forecasting severe weather threats across the U.S.

Other significant weather threats, like damaging hail, straight-line winds, and flash floods, are also possible.

Severe storms brought damaging tornadoes to parts of the central US Thursday and Friday, shredding buildings into piles of debris and killing at least eight people.

A multi-day storm system will bring rounds of severe weather from the southern Plains into the Midwest and Ohio Valley through late Friday.

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Three or more strong tornadoes struck Michigan on Friday, killing four people, injuring dozens, and destroying homes and businesses. A look at data from NOAA shows it’s been four decades since ...