At least 13 people have been killed by a tornado that hit the northern Mexico border city of Ciudad Acuna, the BBC reports.
Hundreds of homes have been damaged or destroyed in the city, in Coahuila state, just across the border from Del Rio, Texas.
The US state has had big floods, with at least three dead and 12 missing.
Coahuila Governor Ruben Moreira, on a visit to the stricken area, said 10 adults and three children had died and a baby was missing. Another 150 people had been taken to hospital, he said.
The authorities say that more than 1,000 homes have been damaged by the storm.