Search teams are using helicopters, boats and drones to look for victims in flash floods that have torn across central Texas since the at the start of the July Fourth weekend. At least 70 people

As early as July 2, officials at the Texas Division of Emergency Management, or TDEM, were publishing news releases warning that “heavy rainfall with the potential to cause flash flooding is anticipated across West Texas and the Hill Country” and readying resources, such as swift-water rescue boat squads.

The flooding Saturday comes on the heels of catastrophic conditions Friday morning in Central Texas, primarily in the Kerrville area. More than 40 people have died in flood waters resulting from heavy rain in Kerr County, while search-and-rescue operations are ongoing. A group of more than 20 girls with Camp Mystic in Kerrville remain missing.