At least 82 people have died, including 27 campers from Camp Mystic, following Texas flash floods that caused devastation over the holiday weekend.

In the early hours of July 4, the only sound many of the vacationers along the banks of the Guadalupe River would have heard was pounding rain and thunder. They didn’t get any official warning of the rapidly rising waters that ultimately proved deadly to dozens of people swept away in central Texas flash floods.