13 people have been killed in the US state of Texas after heavy rain caused flash flooding, according to local media reports.

Officials have also said more than 20 are missing from a girls’ camp in Texas.

As much as 10 inches (25 centimetres) of heavy rain fell in just a few hours overnight in central Kerr County, causing flash flooding of the Guadalupe River.

Judge Rob Kelly, the chief elected official in the county, confirmed fatalities from the flooding and dozens of water rescues so far.

The judge told reporters at a news conference that “most” of the bodies are yet to be identified.

“We’re trying to get the identity of these folks, but we don’t have it yet,” he said.

A flood watch issued on Thursday afternoon estimated isolated amounts up to seven inches (17 centimetres) of rising water.

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