The death toll rose to 109, including at least 27 children and counselors from the beloved Camp Mystic, a storied Christian girls camp in Kerr County, where flooding hit the hardest beginning July 4. At least 30 children were among those killed in the county, Sheriff Larry Leitha said in an update Tuesday morning.

Texas Hill Country is known for its landscapes, where shallow rivers wind among hills and through rugged valleys. That geography also makes it one of the deadliest places in the U.S. for flash flooding.