Hidalgo, Willacy and Cameron counties in Texas faced among the heaviest storms, which lasted for about 48 hours, local officials said.

Hidalgo County said at least three deaths were reported and “involved law enforcement efforts”.

Other information was not immediately available.

An 83-year-old man drowned in Reynosa, Mexico, the Associated Press reported, citing authorities in the Mexican state of Tamaulipas.

Thunderstorms began Wednesday, with another round of heavy rainfall on Thursday afternoon and evening, according to ABC News.

The rain continued through yesterday afternoon.

The US national weather service issued several flash flooding emergency warnings for some areas.

“This is a particularly dangerous situation,” it said in one statement.

ABC News reported that the South Texas Health System hospital in McAllen experienced minor flooding on its first floor.

Several school districts in the region cancelled classes.

The region received between 15cm to 31cm of rain or more in some areas, ABC News reported.