Emergency officials are starting to focus on alert systems as they search for answers about how the flash flooding swept away so many.

At least 27 campers and counselors were killed at Camp Mystic during the devastating Texas floods. Some are still missing.

State emergency personnel are aiding local search and rescue operations "around the clock" as they search for potential survivors in Texas, Gov. Greg Abbott said. Several areas in central Texas and the Hill Country are still under "a threat of heavy rain with the potential to cause flooding,