Deadly tornado flips cars, wreaks havoc in Mexico. Across border, Texas faces flood.

At least 13 people have been killed by a category 4 tornado that swept through Ciudad Acuña Monday.

Images from the town, just across the border from Del Rio, Texas, showed cars flipped, buses smashed and hundreds of homes destroyed or damaged.

The tornado reached speeds of up to 186mph and officials say there are fears the death toll could rise.

Residents stand next to a damaged car after the tornado hit Ciudad Acuña.

Credit:

Ramiro Gomez/Reuters

Residents stand outside their damaged houses after a tornado hit Ciudad Acuña. The whirlwind damaged as many as 350 homes, knocking down walls and ceilings, and slammed into vehicles in the city that lies across the Rio Grande from Del Rio, Texas.

Credit:

Jaime Escamilla/Reuters

Across the border from Ciudad Acuña, Texas also saw tornados and heavy rains resulting in massive flooding from the storm system.

Flood damaged vehicles and debris are strewn across lawns in San Marcos, Texas May 26, 2015.

Credit:

Tamir Kalifa/Reuters

Houston received 10 inches of rain during the storm. Many parts of the city are flooded bringing it to a near-standstill Tuesday.

PHOTOS: Major flooding shuts down several freeways in #Houston area. http://t.co/tHf1an2NNB#TexasFloodpic.twitter.com/laCAJoMqxS

— LiveDoppler7HD (@LiveDoppler7HD) May 26, 2015

Wow. Galleria Mall parking garage flooding. #HoustonFloodpic.twitter.com/hu3jWY5LsF

— Lily Jang (@KHOULily) May 26, 2015

I-45 Northbound in Houston this morning. (Thanks for @gdimeweather for this split screen) #houstonflood#atxfloodspic.twitter.com/kKlGafBfDG

— Keith Carson (@KeithCarson) May 26, 2015