Camp Mystic is grieving the loss of 27 campers and counselors following the catastrophic flooding in the Texas Hill Country.

Many camps in the Guadalupe river region are adjacent or are partially inside high-risk flood zones, according to maps from the Federal Emergency Management Agency.

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.

One Guadalupe River flood gauge near Kerrville and Camp Mystic recorded a rise of more than 25 feet in two hours.

The night that devastating flooding obliterated parts of Texas, Stuart Gross said he was awakened by nearby screams as raging waters swept up homes and citizens. The Ingram, Texas, resident told ABC News he has lived near the Guadalupe River for more than 45 years and has seen other floods,

Parts of the state devastated by flash floods that left at least 82 dead were braced for more heavy rains as forecasters extended flood warnings through Monday evening.