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

At least 120 people are dead and dozens are still missing after devastating flash floods slammed Texas Hill Country, with water rescues taking place along the Guadalupe River, which rose rapidly early Friday morning to the height of a two-story building.

On Wednesday, hundreds prayed, wept, and held one another at a prayer service, among the first of many somber gatherings to come in the weeks ahead.