Over 100 people have died after heavy rain pounded Kerr County, Texas, early Friday, leading to "catastrophic" flooding, the sheriff said.

After deadly flooding devastated parts of Kerr County, grief has rippled far beyond the disaster zone, even reaching some of the state's youngest residents. In the wake of tragedy, children across Texas are finding ways to help, turning their sadness into service for those affected.

The torrential rain that brought destruction to a children’s summer camp and other holiday spots in rural Texas came with devastating speed. Water came crashing through the stone cabins of Camp Mystic in the early hours of Friday with little warning as the girls and staff slept.

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.