A fifth of US crude in the Gulf of Mexico and 28% of gas offline, the regulator says.

HOUSTON (Reuters) – Nearly a fifth of output and 28 percent of production in federal waters in the U.S. Gulf of Mexico remain offline in the wake of Hurricane Francine, the U.S. offshore energy regulator said on Sunday.

Francine tore through large oil and natural gas producing areas and hit Louisiana as a Category 2 hurricane on Wednesday. The storm toppled trees, flooded coastal areas and knocked out power in four southern states.

Energy producers had 338,690 barrels per day of oil production and nearly 515 million cubic feet of natural gas offline in Gulf waters on Sunday, the Bureau of Safety and Environmental Enforcement estimated from producer reports.

Cumulative offshore production losses due to Francina total 2.16 million barrels of crude oil and 4.635 billion cubic meters of natural gas, according to a Reuters report of BSEE’s daily estimates.

There were still 37 oil and gas rigs evacuated Sunday, about 10 percent of the Gulf of Mexico’s total, down from 171 offshore rigs evacuated at their peak last week, the offshore regulator said, citing reports from producers.