JUNCTION, Texas – The number of people who are unaccounted for following flooding in Junction, Texas Monday morning has risen.

Texas Game Wardens now say four people are missing after fast-rising rainwater swept through the South Llano RV Park, which is off Lake Junction.

Texas Game Warden Rachel Kellner did not provide names for the four missing individuals.

Kellner said the four people were working on a pipeline project in the area. There have been no confirmed fatalities. A search utilizing helicopters, boats and a drone are underway.

The Llano River, which feeds into Lake Junction, has risen more than 27 feet in 10 hours.

According to Kellner, authorities from surrounding areas have already assisted in 19 rescues, four of which involved the Texas Department of Public Safety's helicopter and the rest were conducted via rescue boats.

Alabama residents in Junction during flooding reported missing, some later found

Earlier Monday, Mike Lambert, chief deputy of the Escambia County Sheriff's Office in Alabama, said four people from Flomaton, Alabama, who were in Junction for work were unaccounted for. Joey Huss, 55; Mike Magee, 63; and Charlotte Moye, 63; remain unaccounted for, Lambert said.

Lambert said six people from Flomaton were staying at the South Llano RV Park when waters started to rise early Monday morning.

According to Lambert, three men are welders working a construction project in the area and were living at the RV park. Two lived there with their wives and a third was visiting from Alabama when the flood happened.

Guests safe but stranded at South Llano River State Park

Tom Harvey, a spokesman for Texas Parks and Wildlife, said 45 park visitors and approximately eight staff members inside South Llano River State Park are safe, but unable to leave due to flooding.

Harvey said the main entrance road bridge is flooded and not passable, so there is currently no way to drive in or out of the park.

Editor's note: An earlier version of this report stated only one Alabama resident remained unaccounted for. This report has been updated to include new information from the Escambia County Sheriff's Office.