At least 59 people have died after heavy rainfall caused flash flooding in parts of central Texas on Friday, authorities have said.

Texas Gov. Greg Abbott visited the all-girls retreat Camp Mystic late Saturday as the death toll from Friday's flash flooding of the Guadalupe River continued to rise through the weekend.

At least 59 people are dead after heavy rain pounded Kerr County, Texas, on Friday, leading to "catastrophic" flooding, the sheriff said.At least 21 children are among the dead, Kerr County Sheriff Larry Leitha said at a news conference Sunday morning.