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

New flash flooding hit parts of Kerr County, Texas on Sunday, just nine days after the same region saw devastating floods that left 129 dead. “Life-threatening flash flooding” struck

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 Texas Hill Country has been notorious for flash floods caused by the Guadalupe River. Here's why the area is called "Flash Flood Alley."

More than two dozen Mexican rescue volunteers and firefighters have been looking for victims and clearing debris along the Guadalupe River. Others were left waiting for visas and humanitarian permits to cross the border.

After hours of waiting and praying in the attic, the water stopped rising and the family was rescued. A first responder helped Matteson, wearing a navy and pink floral dress and quilted white jacket, into the back of a car. Her family survived. Their home was not so lucky.

President Donald Trump toured the devastation left by flash flooding in central Texas amid growing questions about how local officials responded to the crisis as well as questions about the federal response -- including the fate of the Federal Emergency Management Agency -- that he has so far avoided.