As authorities launch one of the largest search-and-rescue efforts in recent Texas history, they have come under intensifying scrutiny over preparations and why residents and youth summer camps that are dotted along the river were not alerted sooner or told to evacuate.

A swift-moving flood that swept through the Hill Country of Texas on Friday, killing at least 32 people and leaving many more missing, was a flash flood.

At least 24 people were killed and a frantic search continued overnight for many others missing in the Texas Hill Country, including more than 20 from a girls camp, after a