Torrential rain left large parts of Houston submerged on Tuesday and trapped fans at an NBA basketball game, in savage weather that has killed nearly 20 people in the United States and Mexico.
The southern US States of Texas and Oklahoma, and far northern Mexico, have borne the brunt of several days of wild weather, including tornadoes, which have left scores dead, missing and injured on both sides of the border.
More than 10 inches (25 centimeters) of heavy rain fell in just a few hours in the Texas city of Houston, triggering the worst flooding there in at least a decade and stranding at an arena spectators who had gone to watch a Houston Rockets basketball game last night.