Relentless thunderstorms continued to drench hard-hit parts of the central U.S., threatening "catastrophic" flooding.

Heavy rain, severe thunderstorms and the risk of tornadoes are threatening more than 40 million people from Michigan to Texas as a slow-moving cold front hovers over the region.

Relentless thunderstorms continued to drench hard-hit parts of the central U.S., threatening "catastrophic" flooding.

Volatile spring weather will kick into high gear this week as a potential severe thunderstorm outbreak and life-threatening flooding loom large for tens of millions of people in the central and eastern United States.

Intense thunderstorms are expected to unleash rounds of heavy rain that could bring dangerous flooding to tens of millions of people in the central and eastern US this week.

Fierce storms pounded a large stretch of the central-eastern United States overnight, with officials on Thursday reporting at least seven deaths

Forecasters issued some of their rarest and most extreme alerts on Wednesday as they warned a powerful storm system would stall over the central part of the country.

Repeated waves of thunderstorms will pose risks to lives and property through the weekend in the same areas that were blasted by deadly storms on Wednesday and Wednesday night.