MIAMI– Genevieve strengthened into a major hurricane in the Pacific Ocean on Sunday and is expected to intensify well southwest of Mexico, but will remain offshore on a track roughly parallel to the coast.

Genevieve had maximum sustained winds of 140 mph (220 kph), making it a Category 4 hurricane, according to the National Hurricane Center in Miami. A major hurricane is a Category 3, with winds of at least 179 kph (111 mph) or higher.

The center of Genevieve was located about 530 miles (855 kilometers) southwest of Manzanillo, and was heading west-northwest at 14 mph (22 kph).

There were no coastal watches or warnings in effect, but the hurricane center said storm surge, which would likely cause “life-threatening surf conditions and rip currents,” was affecting parts of Mexico’s southwest coast and would likely reach parts of the southern Baja California Peninsula on Sunday night or Monday.

The storm was expected to strengthen further before weakening midweek.

Farther northwest in the Pacific, Hurricane Fausto weakened to a Category 1 storm as it continued its path in the general direction of the Hawaiian Islands.

Forecasters said Fausto was expected to be downgraded to a tropical storm in the coming days, but warned it could still generate significant waves in parts of Hawaii.

Fausto had maximum sustained winds of 140 kph (85 mph). It was about 825 miles (1,330 kilometers) east of Hilo and was moving west at 14 mph (22 kph).