Ida swept past the Mexican resort of Cancun and aimed for the Gulf of Mexico but is expected to weaken gradually as it heads toward some of the oil and gas production facilities in the central Gulf, the U.S. National Hurricane Center said.

The storm reached hurricane force again late on Saturday and strengthened to a Category 2 storm on Sunday with sustained winds of near 100 mph (145 kph), the Miami-based hurricane center said in its 1 p.m. EST (1800 GMT) advisory.

Energy companies in the Gulf of Mexico were monitoring Ida, but so far oil and gas production have not been affected.

The Louisiana Offshore Oil Port, the only terminal in the United States capable of handling the largest tankers, said it would stop unloading ships due to stormy seas.

A quarter of U.S. oil and 15 percent of its natural gas are produced from fields in the Gulf and the coast is home to 40 percent of the nation’s refining capacity.

The hurricane center set a hurricane watch from Grand Isle, Louisiana to Mexico Beach in northwestern Florida, but did not include the city of New Orleans. A hurricane watch means hurricane conditions are expected in the area within 36 hours.

DEATH TOLL RISES

In El Salvador, rivers burst their banks and hillsides collapsed under relentless rains triggered by Ida’s passage, cutting off parts of the mountainous interior from the rest of the country.

El Salvador’s government said 91 people were now dead and at least 60 were missing as a result of deadly mudslides and floods.

As of 1 p.m. EST (1800 GMT), Ida was 100 miles (155 km) north-northeast of the Caribbean resort island of Cozumel, Mexico, and about 75 miles (125 km) west of the western tip of Cuba, the hurricane center said.

It was moving northwest near 10 mph (16 kph) and was forecast to turn toward the north over the next two days.

In Mexico, the government urged people to avoid unnecessary travel in the Yucatan Peninsula and imposed restrictions on coastal shipping.

About 1,000 people were evacuated from Holbox island northwest of Cancun, an isolated fishing community and sanctuary for thousands of flamingos and other exotic birds.

In Cancun the airport remained open but there were no plans to evacuate approximately 12,000 people visiting the resort, which is popular with American tourists.

Ida first became a hurricane on Thursday off the Caribbean coast of Nicaragua, where heavy rains forced more than 5,000 people into shelters.

The country’s coffee crop was not directly affected by the storm, according to the local coffee council.