Some 43 people, including 15 children, have been confirmed dead following flash floods in central Texas, authorities said as rescuers continued a frantic search for campers, vacationers and residents who were still missing.
More than 850 people had been rescued, including some who were clinging to trees, after a sudden storm dumped up to 38cm of rain in an area around the Guadalupe River, about 140km northwest of San Antonio.
Among the missing were 27 girls from the Camp Mystic summer camp, Kerrville city manager Dalton Rice said at a press conference on Saturday evening, and there may be others beyond that.
"We are kind of looking at this in two ways called the known missing, which is the 27 ... We will not put a number on the other side because we just don't know," Rice said.
The disaster unfolded rapidly on Friday morning as heavier-than-forecast rain drove river waters rapidly to as high as 29 feet.
Onlookers survey damage along the Guadalupe River after a flash flood swept through the area. Source: AAP / Eric Gay/AP
Kerr County sheriff Larry Leitha said eight of the confirmed dead, including three children, had yet to be identified.
Texas lieutenant governor Dan Patrick said an unknown number of visitors had come to the area for an Independence Day celebration by the river.
“We don't know how many people were in tents on the side, in small trailers by the side, in rented homes by the side," he said on Fox News Live.
Camp Mystic had 700 girls in residence at the time of the flood, according to Patrick. Another girls' camp, Heart O' the Hills, said on its website that co-owner Jane Ragsdale had died in the flood but no campers had been present as it was between sessions.
The Camp Mystic Christian summer campsite was completely destroyed. Source: AP / Julio Cortez
Local officials said the extreme flooding struck before dawn on Saturday (AEST) with little or no warning, precluding authorities from issuing advance evacuation orders as the Guadalupe River swiftly rose above major flood stage in less than two hours.
US homeland security secretary Kristi Noem said a "moderate" flood watch issued the previous day by the National Weather Service did not accurately predict the extreme rainfall and said the Trump administration was working to upgrade the system.
The administration has cut thousands of jobs from the National Weather Service's parent agency, the National Oceanic and Atmospheric Administration, leaving many weather offices understaffed, said former NOAA director Rick Spinrad.
He said he did not know if those staff cuts factored into the lack of advance warning for the extreme Texas flooding, but said they would inevitably degrade the agency's ability to deliver accurate and timely forecasts.
"People's ability to prepare for these storms will be compromised. It undoubtedly means that additional lives will be lost and probably more property damage," he said.
