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.

Despite the morning storms, there's still a risk of severe weather that could produce tornadoes, hail and flooding Tuesday afternoon, evening and night. Sign up for our Newsletters>> Go to the KOCO weather page | Get KOCO on the Go | Subscribe to KOCO 5's YouTube channel12:38 p.

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.