Several factors, both meteorological and geographical, created a nightmare recipe for flash flooding across the Texas Hill Country.

Texas Hill Country was beset by death and disaster Friday as at least six people were killed and about 20 girls attending a summer camp were reported missing after months worth of heavy rain fell in a matter of hours.

Months worth of heavy rain fell in a matter of hours on Texas Hill Country, leaving 24 people dead and many more unaccounted for Friday, including more than 20 girls attending a summer camp, as search teams conducted boat and helicopter rescues in fast-moving floodwaters.

Some 27 people, including nine children, have been confirmed dead after flash floods in central Texas, authorities said on Saturday, as rescuers continued a frantic search for survivors including dozens still missing from a girls' summer camp.

Mr. Trump said his administration was working with state and local officials and that Department of Homeland Security Secretary Kristi Noem would be arriving in Texas shortly. DHS oversees the Federal Emergency Management Agency.

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,