When too much rain falls for the ground to absorb, it runs downhill, pulled by gravity into streams, creeks and rivers.

Here’s what to know about the deadly flooding, the colossal weather system that drove it in, and around Kerr County, Texas, and ongoing efforts to identify victims.

Hundreds of searchers were combing wide swaths of Central Texas yesterday after severe rainfall caused flash flooding on the Guadalupe River. As the death toll climbed to at least 80, and dozens remained unaccounted for, forecasters warned of more rain and possible flash flooding in hard-hit areas. We have live updates.