Torrential rain has caused flash flooding in parts of central Texas, killing more than 20 people.

In Kerr County, more than 20 girls are missing from Camp Mystic, a private Christian summer camp located along a river that rose more than 20 feet in less than two hours. It “does not mean they are lost,” Lt. Gov. Dan Patrick cautioned, while Gov. Greg Abbott said that search and rescue operations will continue through the night. Throughout Kerr County, more than 230 people have been rescued or evacuated so far, many by helicopter, authorities said.

Some areas saw a month’s worth of rain in just a few hours overnight into Friday. Heavy rain is expected to continue Saturday.

A person looks out at flooding in Kerrville, Texas.
A person looks out at flooding in Kerrville, Texas.
Ronaldo Schemidt/AFP/Getty Images
A downed sign is seen after a flash flood swept through the area in Ingram.
A downed sign is seen after a flash flood swept through the area in Ingram.
Julio Cortez/AP
Overturned vehicles, broken trees and debris sit in floodwaters in Kerrville.
Overturned vehicles, broken trees and debris sit in floodwaters in Kerrville.
Ronaldo Schemidt/AFP/Getty Images
Flooded houses and streets are seen in San Angelo, Texas, on Friday, June 4.
Flooded houses and streets are seen in San Angelo, Texas, on Friday, June 4.
Patrick Keely/Reuters
Families hug at a reunification center in Ingram, Texas, after flash flooding hit the area on Friday.
Families hug at a reunification center in Ingram, Texas, after flash flooding hit the area on Friday.
Eric Gay/AP
A family portrait seen among flood debris along the Guadalupe River in Kerrville.
A family portrait seen among flood debris along the Guadalupe River in Kerrville.
Eric Gay/AP
People observe damage caused along the Guadalupe River in Kerrville.
People observe damage caused along the Guadalupe River in Kerrville.
Eric Gay/AP
Thomas Rux, a resident of Riverside RV Park in Ingram, looks through the wreckage of his RV that was swept away by floodwaters.
Thomas Rux, a resident of Riverside RV Park in Ingram, looks through the wreckage of his RV that was swept away by floodwaters.
Christopher Lee/he San Antonio Express-News/AP
A flooding Guadalupe River, seen in Kerrville, Texas, leaves fallen trees and debris in its wake on Friday.
A flooding Guadalupe River, seen in Kerrville, Texas, leaves fallen trees and debris in its wake on Friday.
Eric Gay/AP
An overturned vehicle in Kerrville.
An overturned vehicle in Kerrville.
Eric Gay/AP
A Texas Department of Public Safety helicopter conducts an aerial search along the Guadalupe River in Kerrville, in the wake of destructive flooding on Friday.
A Texas Department of Public Safety helicopter conducts an aerial search along the Guadalupe River in Kerrville, in the wake of destructive flooding on Friday.
Christopher Lee/The San Antonio Express-News/AP
Kerrville Fire Department first responders scan the banks of the Guadalupe River in Ingram.
Kerrville Fire Department first responders scan the banks of the Guadalupe River in Ingram.
Michel Fortier/The San Antonio Express-News/AP
First responders deliver people to a reunification center in Ingram.
First responders deliver people to a reunification center in Ingram.
Eric Gay/AP
Men survey damage left by the flooded Guadalupe River in Kerrville.
Men survey damage left by the flooded Guadalupe River in Kerrville.
Eric Gay/AP
A woman watches flood waters along the Guadalupe River in Kerrville on Friday.
A woman watches flood waters along the Guadalupe River in Kerrville on Friday.
Eric Vryn/Getty Images