Just over a week after deadly flash floods swept through Texas Hill Country, the region may once again face a life-threatening deluge as slow-moving thunderstorms bring heavy rain, flash flooding, and rapid river rises to parts of central Texas Sunday.

"It's not community to community. It's a national system," Sen. Maria Cantwell said on "Face the Nation with Margaret Brennan."

Texas on Saturday faces an upper-atmosphere wave of low pressure that could trigger storms and an increasingly deep flow of Gulf moisture.

This is false. It is not possible that cloud seeding generated the floods, according to experts, as the process can only produce limited precipitation using clouds that already exist.

Some experts say staff shortages might have complicated forecasters’ ability to coordinate responses with local emergency management officials.

On the night the deadly floodwaters raged down the Guadalupe River in Texas, the National Weather Service forecast office in Austin/San Antonio was missing a key member of its team: the warning coordination meteorologist,

The NWS Fort Worth TX issued a flood advisory at 8:37 p.m. on Saturday in effect until 11:45 p.m. The advisory is for Collin, Dallas and Denton counties.

Here's what to know about the deadly flooding, the colossal weather system that drove it and ongoing efforts to identify victims.