Flash floods in Texas killed at least 82 people over the Fourth of July holiday weekend and left others still missing, including girls attending a summer camp.

The devastating floods that struck central Texas over the Fourth of July weekend have become one of the deadliest flood events in the U.S. in the past century, Newsweek previously reported. By Sunday evening, authorities had confirmed at least 82 fatalities.

Flash flooding in Texas Hill Country, triggered by intense thunderstorms, has resulted in at least 81 deaths, including at least 28 children. Camp Mystic, a girls' camp located on the Guadalupe River, confirmed at least 27 deaths among campers and counselors.

Texas Gov. Greg Abbott said emergency responders remained in a search and rescue posture, hours after the flooding along the Guadalupe River inundated nearby areas. "So many people have been swept up into an extraordinary catastrophe,

Flash-flood warnings and watches remain in effect for parts of Central Texas into Sunday evening, dimming hopes that more survivors would be found.