The heavy rain that turned a river in Texas into a raging wall of water was fueled by unique atmospheric conditions, according to meteorologists and climate scientists.

The flash flooding deluged summer camps in Kerr County, dotted along the Guadalupe River, and also left families in Burnet, Kendall, Tom Green, Travis and Williamson Counties looking for family

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.