Tropical storm Nicholas hit Texas and parts of Louisiana with heavy rain, power outages and the threat of flash floods as well as storm surges Tuesday morning as it moved inland from the Gulf Coast.
The storm was upgraded to a hurricane after reaching land at 00:30 (05:30 GMT), has now weakened but still had the power to cause "life-threatening flash floods in the deep south in the next couple of days," the hurricane Centre said.
More than 500,000 power outages have been reported in Texas in addition to 95,000 in Louisiana, just after 8 a.m. ET, according to poweroutage.us.
President Joe Biden declared an emergency in Louisiana.
Nicholas is carrying maximum sustained winds of 70mph (110km/h), weather officials said, and is expected to hit the Texas coast and upper Louisiana with five to 10 inches of rain.
It comes just weeks after Hurricane Ida - the fifth strongest to ever hit the US mainland - killed dozens and left more than a million Louisiana residents without power.