Emergency responders kept hope alive as they combed through fallen trees and other debris that littered the hard-hit central Texas communities on the fifth day after devastating floods killed more than 100.

The National Weather Service began sending flash flood warnings that should have triggered cellphone alerts a little after 1 a.m., while local officials began posting on Facebook about four hours later.

Flash floods that swept through Texas over the Fourth of July weekend have left more than 100 people dead and more than a dozen others missing.

Five days after deadly floods struck central Texas, search and rescue teams are continuing to probe debris for those still missing.

Torrential rains before dawn on Friday deluged the Guadalupe River, which burst its banks and killed dozens of people, leaving behind mangled piles of debris, trees and cars.