The U.S. state of Louisiana has declared a state of emergency as a powerful storm approaches from the Gulf of Mexico.
The National Hurricane Center says a tropical depression is located about 365 kilometers southwest of the mouth of the Mississippi River, with maximum winds of 55 kilometers an hour. Forecasters expect it to evolve into a tropical storm named Lee, making it the 12th named storm of the 2011 Atlantic hurricane season.
A tropical storm warning has been issued for parts of Louisiana, including New Orleans, as well as neighboring Mississippi and Texas, which could be drenched by as much as 38 centimeters of rain. Louisiana Governor Bobby Jindal issued the emergency order to prepare residents and officials for the threat of flash flooding.
Oil companies such as Shell, Exxon Mobil and BP have shut down their oil and gas platforms in the Gulf of Mexico and started evacuating workers. Chevron said it was evacuating non-essential workers, but announced no impacts to production.
The news comes as emergency crews continue to help residents recover from a hurricane that ravaged the eastern U.S. just days ago.
Flooding devastated parts of the states of Vermont, Connecticut, New York and New Jersey after Hurricane Irene brought high winds and heavy rains to the eastern U.S.
Hundreds of thousands of people in the region are still without power, and many schools remain closed. Roads in the area are under repair.
Irene hit North Carolina Saturday with 120 kilometer per hour winds, before moving up the East Coast and weakening.
Irene is blamed for at least 45 deaths in the U.S. and five in the Caribbean, and has caused billions of dollars of damage. U.S. President Barack Obama signed disaster declarations for New York, New Jersey and North Carolina, making federal funding available for recovery efforts.
Mr. Obama is scheduled to visit the state of New Jersey on Sunday to view wind and flood damage from Irene.
Meanwhile, forecasters are monitoring Tropical Storm Katia in the Atlantic, which is moving west with maximum sustained winds of 110 kilometers per hour.
Katia was briefly strong enough to be classified as a Category One hurricane on the five-point scale of hurricane intensity. Forecasters at the National Hurricane Center expect it to regain strength and become a major hurricane by Saturday. It is the second Atlantic hurricane of the season.
September is normally the peak of the hurricane season. Experts predicted an active 2011 hurricane season with eight to 10 hurricanes possible, which would be slightly more than normal.
