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The San Antonio Express-News via AP, Jerry Lara
Andrea Jones helps remove a downed tree on River Road, Monday, May 25, 2015, in Wimberley, Texas. Around a dozen people were reported missing in flash flooding from a line of storms that stretched from the Gulf of Mexico to the Great Lakes.

3 p.m. CDT

Texas Gov. Greg Abbott says the damage caused by flash-flooding in Central Texas is "absolutely devastating."

The governor flew over parts of the rain-swollen Blanco River on Monday, a day after heavy rains pushed the river out of its banks and into surrounding homes in the small town of Wimberley.

At a news conference, Abbott says the damage he saw was "absolutely massive" from the storms' "relentless tsunami-type power."

He stressed that communities downstream need to monitor flood levels and take seriously the threat of the ongoing storms.

Abbott didn't offer updates on the dead or missing following the powerful storms sweeping through parts of Texas and northern Mexico. In Texas, at least one person has died and 12 are missing; in Mexico, a tornado Monday killed more than a dozen people.

But the governor did add 24 counties to his state disaster declaration, bringing the total to 37 counties in mostly the eastern half of the state. That allows for further mobilization of state resources to assist disaster-struck communities.

1:30 p.m. CDT

The death toll from the tornado in the Mexican border city of Ciudad Acuna has risen to 13.

Coahuila state spokeswoman Rosario Cano says the number of dead rose with the discovery of more bodies.

The head of Mexico's national civil defense agency, Luis Felipe Puente, told local media that 230 people had been injured and that shelters are being set up.

The twister hit shortly after daybreak on Monday. It destroyed homes, upended cars and ripped an infant in a baby carrier from its mother's arms. The child is missing.

Ciudad Acuna is a city of about 100,000 across the border from Del Rio, Texas.

12:30 p.m. CDT

Cars and trucks are lined up for a quarter-mile waiting to get back into a small Central Texas town that was heavily damaged by flash flooding.

Residents were waiting Monday for police to open a bridge over the rain-swollen Blanco River into Wimberley, about 35 miles southwest of Austin.

Residents have been waiting to inspect their homes since heavy rains pushed the river out of its banks Sunday and destroyed or damaged hundreds of homes.

Dana Campbell lives on a bluff above the river. The 69-year-old retired engineer said Monday that the damage left behind by the floodwaters looks the swath of a tornado, with damage "as far as the eye can see."

10:45 a.m. CDT

Authorities say a dozen people are missing after flash flooding along the Blanco River in Central Texas that damaged hundreds of homes.

Kristi Wyatt, a spokeswoman for the city of San Marcos, said Monday that 12 people are now missing after the flooding Sunday, when three people were reported missing. Wyatt says she didn't immediately have more information.

Former Nueces County Commissioner Joe McComb says his son's wife and their two children are among the missing.

McComb tells the Corpus Christi Caller-Times that his 36-year-old son, Jonathan, is hospitalized in San Antonio with multiple injuries after a house he was staying at was knocked off its foundation and carried down the raging river Sunday. It struck a bridge and then began breaking up.

The Episcopal Church of the Good Shepherd says five members of two families from the Corpus Christi church also were in the house and are missing.

10 a.m. CDT

A tornado raged through the northern Mexico border city of Ciudad Acuna early Monday, killing at least 10 people, destroying homes and upending cars and other vehicles.

Rosario Cano, spokeswoman for the interior department of the northern state of Coahuila said 10 people had been confirmed killed so far in the twister, which struck around 6:40 a.m. Central time.

Photos from the scene showed cars with their hoods ripped off, resting upended against the facades of one-story houses.

One car's frame was literally bent around the gate of a house. A bus was seen flipped and crumpled on a roadway.

Ciudad Acuna is a city of about 100,000 across the border from Del Rio, Texas.

Cano said top state officials had set out to review the damage and coordinate response to the disaster.

7:30 a.m. CDT

An evacuation order has been lifted for people living near a reservoir north of Houston after weather improved and work crews made progress shoring up threatened areas along a levee weakened by recent heavy rains.

Montgomery County authorities allowed residents back into their homes in neighborhoods near the Lewis Creek Reservoir late Sunday evening.

County Judge Craig Doyal said he regrets the inconvenience that several hundred residents may have experienced, but he says the decision to order evacuations early Sunday was made based on weather forecasts at the time and in the interest of public safety.

The reservoir serves an Entergy power plant about 50 miles north of Houston. Officials have reported no breaches.

1 a.m. CDT

A line of storms stretching from the Gulf of Mexico to the Great Lakes dumped record rainfall on parts of Texas, Oklahoma and other Plains and Midwest states.

The weekend storms spawned a tornado that damaged a Houston apartment complex and caused major flooding that forced at least 2,000 Texans from their homes.

Authorities are blaming three deaths on the storms. Two were in Oklahoma and the last was in Texas, where a man's body was found along the swollen Blanco River.

Among the worst-affected communities are Wimberley and nearby San Marcos in the Central Texas corridor between San Antonio and Austin. Many homes in those communities were damaged or destroyed.

More rain is in the forecast for Monday for a large swath of the nation's midsection.