UVALDE, Texas — Slow-moving storms drenched much of southern Texas with more heavy rain on Wednesday, prompting warnings to evacuate flooded areas after downpours washed out roads and farmland and led to dozens of high-water rescues across the region.

The National Weather Service said a tornado touched down in the northwestern part of San Antonio near Interstate 10. Videos posted on social media showed what appeared to be a small twister. Local officials said apartment buildings and other properties were damaged.

Warnings of potentially dangerous flash flooding were in effect for some areas as the deluge was forecast to continue through Thursday evening, and authorities ordered mandatory evacuations for some parts of Uvalde County. They also urged people in other areas and the city of Boerne, outside San Antonio, to voluntarily evacuate rather than be marooned by high water.

In Kerr County, where catastrophic flooding last year killed more than 100 people, officials were in contact with summer camps and retreat centers near rising rivers.

As much as 10 to 20 inches of rain was possible in some places before the storms move out, the weather service said.

There have been no reports of deaths or injuries from the tornado or the flooding.

More than a foot of rain has fallen with more to come

The highest rainfall totals so far — up to 16 inches — have been in Uvalde County, where officials tallied 25 rescues as of 9 a.m. Wednesday, and said more people needed help as river levels rose.

Highways and roads were closed across the region because of high water.

The county normally gets about 23 inches of rain a year, according to the Uvalde County Extension Office.

The Uvalde Police Department said on Facebook at 1 p.m. that a dam in the northern part of the county was still intact, but the Leona River was still expected to rise another 15 feet. Police warned people along the river to get to higher ground.

State Rep. Don McLaughlin said that despite a “little lull,” the rainfall wasn’t done and waterways could become more dangerous. “The rivers and the creeks are going to be coming up, and they’re going to be coming up again with a vengeance,” McLaughlin said.

Frances McNamara and her 10-year-old son, Everett, watched the bloated Leona River in Uvalde sweep southward Wednesday as she considered possible evacuation routes. She pointed to a solid line of dirt, branches and twigs about 8 feet above the river where the water reached the day before.

“We’ve seen the water rise, but not to this extent,” she said, describing how it rushed through a ditch next to her home with enough force to sound like a river on Tuesday.

This week’s severe weather brought back memories of last year’s deadly flooding in Texas Hill Country.

“It scared me,” said McNamara, her eyes wet with tears as she recalled the 2025 floods. “Cause I have a son, and to know what those parents went through.” Her son reached up and patted her back.

Texas Gov. Greg Abbott has issued disaster declarations for dozens of counties.

Authorities posted videos on Tuesday showing a rescue crew in a boat navigating flooded streets and a vehicle being swept away by fast-moving waters. Five people were rescued by the Texas Game Warden Search and Rescue Team and four were rescued by a local game warden, said Maggie Berger, a Texas Parks and Wildlife spokeswoman.