HOUSTON (Reuters) - A looming low-pressure storm system prompted BP Plc to evacuate workers not essential for production from its four oil and gas platforms in the Gulf of Mexico but output was unaffected, the company said on Wednesday.
Other operators, including Royal Dutch Shell, the biggest oil producer in the Gulf, Anadarko Petroleum Corp and Hess Corp, said they were monitoring the storm but had not begun evacuations.
A Pemex spokesperson said the company was closely monitoring the forming storm, but it had not ordered any offshore or onshore evacuations at any installations.
The Mexican government said late on Wednesday it expected between 3 to 6 inches of rain along its Yucatan peninsula in addition to heavy rain in Gulf coast Veracruz and Campeche states, closer to the country's major oil installations.
The unnamed system had a 70 percent chance of becoming a tropical cyclone in the next 48 hours and was expected to cross the Yucatan and move into the southern Gulf by Thursday, according to the U.S. National Hurricane Center.
About 80 percent of Mexico's oil and gas production comes from mostly shallow-water offshore fields in the potential path of the low pressure system, along the southern rim of the Gulf.
BP, the second-largest oil producer in the Gulf, said workers not essential to production, such as cooks and maids, were being evacuated from its four platforms in the most energy-infrastructure-heavy areas of the Gulf.
"With forecasts indicating the disturbance could possibly strengthen into a tropical storm and move across the central Gulf of Mexico, we are now taking additional steps to respond," the company said.
The four BP platforms have a total capacity of 640,000 barrels per day of oil and 840 million cubic feet per day of natural gas. They include Thunder Horse, the largest oil and gas platform in the world, as well as Atlantis, Na Kika and Mad Dog.
Mexico's government said the death toll from last month's twin storms that pummeled both the Pacific and Gulf coasts now stood at 157, with 8,000 people still housed in shelters.
(Reporting by Kristen Hays in Houston, David Alire Garcia in Mexico City, Eileen Houlihan in New York, and Anupam Chatterjee in Bangalore; Editing by Terry Wade, Dan Grebler, Ken Wills and Alan Raybould)