New rounds of severe thunderstorms and life-threatening, potentially catastrophic, flooding risks are brewing in the central and eastern United States Tuesday, putting more than 50 million people at risk this week.

A tornado watch is in effect for parts of northern Texas until 11 p.m. Monday, according to the National Weather Service (NWS) in Fort Worth. Forecasters warn that storms moving into the area this evening could bring large hail,

Scattered severe thunderstorms, hail and damaging winds are in store for a large stretch of the country on April 29, forecasters said.