Water levels in some major U.S. cities have reached critical levels and the government is urging people to conserve.
The state of Texas is at a critical point, with the National Weather Service saying the water in some areas is now as high as 13 feet (4.8 meters) above normal.
That’s nearly 20 feet above average for the state, according to the National Oceanic and Atmospheric Administration.
Greg Abbott declared a state of emergency in the state Thursday and urged residents to conserve water.
Greg Harris announced a state-wide emergency order in the Houston area, warning residents to “take precautions” to reduce the risk of a flash flood.
“We need to do everything in our power to conserve and reduce our risk,” Harris said.
Water is not the only threat.
Tropical storm Matthew, which hit Texas on Tuesday, is expected to make landfall early Friday.
The storm is expected over the Gulf of Mexico.
The National Weather Services issued a flash warning for parts of Florida, South Carolina, Alabama and Georgia, with heavy rainfall expected along the East Coast and in some places as far south as Florida.
There’s no indication yet if the storm will cause a flash flooding event, but it could cause widespread damage and flooding, the weather service said.
“It could be the worst storm we’ve had in Florida in a long time,” Florida Gov.
Rick Scott said in a press conference.
The storm will bring heavy rainfall and potentially dangerous winds, according the National Hurricane Center.
The Florida Keys are expected to see heavy rainfall from Friday to Saturday, but will be less affected than Florida’s other regions, said Matthew Bump, a senior meteorologist at the National Center for Atmospheric Research.
The flooding in Florida comes as the Florida Keys have become increasingly isolated from the rest of the state and beyond due to the storm.
The Keys, home to more than 1.4 million people, have struggled with low-lying homes and high-rise buildings in the storm’s path, creating problems for the region’s tourism industry.
In recent days, Florida has seen several severe flooding events.
At least three people were killed by the flash flood in Fort Myers on Thursday, the latest death toll since Tropical Storm Allison hit the state on Oct. 20.