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 of dangerous weather this week.

Oklahoma could be in for a wet and wild week of severe weather, with the main tornado threat to the Oklahoma City area on Monday evening.

At least one person has died in southwest Oklahoma after flash flooding hit the region, with authorities warning people to stay off the roads as severe weather warnings continue.