Flash flooding in Williamson County; 20 families evacuated near San Gabriel River

GEORGETOWN, Texas - Williamson County officials say 20 families have been evacuated so far from RV parks along the San Gabriel River.

What we know:

Williamson County Emergency Services said earlier Tuesday that flash flooding was happening near the Shady River and Good Water RV parks in the Georgetown area.

These parks are off SH 29 near the San Gabriel River.

What you can do:

Anyone in those areas was urged to evacuate to higher ground immediately. A temporary evacuation site is open at Georgetown Church of the Nazarene, 4051 E University Ave in Georgetown.

Drivers are advised not to drive through flooded roadways and to check atxfloods for road closures and flood conditions.

Officials are also reminding residents to sign up for Warn Central Texas to get emergency alerts.

FULL: Williamson County officials on flood response

Williamson County officials gave an update on the response to flash flooding in the area. So far 20 families and 17 RVs were evacuated.

By the numbers:

Williamson County officials held a press conference Tuesday afternoon about the county's response.

In attendance was County Judge Steve Snell and Office of Emergency Management director Bruce Clements.

Aerial drone view of San Gabriel River in Georgetown

Paul Briery gave FOX 7 Austin this video shot from his drone of the San Gabriel River after rainstorms Tuesday. The river swelled to almost double, from seven feet to almost 14 feet in less than 12 hours, according to county officials.

Clements said that 20 families have been evacuated, including 17 RVs. Crews are expected to be active until floodwaters recede. Two boat teams are at the ready to assist if needed.

Clements says that this morning at 7:40 a.m., the San Gabriel River was measured at seven feet. By about 4 p.m., the river had risen to 13.7 feet, just a couple feet shy of the threshold for swift water rescue teams to be deployed.

A still image of the San Gabriel River from a FOX 7 photojournalist on Tuesday, April 21.

Big picture view:

The National Weather Service extended a Flash Flood Warning for central Williamson County until 6:15 p.m. CT. It has since expired. 

The warning included Round Rock, Georgetown, Taylor, Leander, Hutto, Liberty Hill, Jarrell, Florence, Thrall and other cities.

NWS said that between two and five inches of rain had already fallen by 11:43 a.m. CT and additional rain up to one inch was possible.

Local emergency management reported to NWS that several low water crossings had closed throughout the county.

RV parks previously impacted by July floods

PREVIOUS COVERAGE: Shady River RV resort damaged by flooding

FOX 7's Clif Thornton talked to people staying at the Shady River RV resort on Saturday. The resort was badly damaged by flooding.

Dig deeper:

This is not the first time the Shady River RV resort has been impacted by flooding.

The resort suffered badly during the deadly and devastating July 4th floods that swept through Central Texas last year.