Hurricane Raymond has become a Category 3 storm with winds near 120 mph (195 kph) as it swirls near Mexico's already soaked Pacific coast.
And the U.S. National Hurricane Center says early Monday that additional strengthening is possible.
Raymond has stalled south of Mexico but a general northward drift is expected that will bring the hurricane closer to the coast. The hurricane is centered about 165 miles (265 kilometers) west-southwest of Acapulco.
Hurricane Raymond brings the threat of heavy and possibly dangerous rains a month after Tropical Storm Manuel caused widespread damage with floods and mudslides.
A hurricane warning was in effect from Tecpan de Galeana, up the coast from Acapulco, north to the port of Lazaro Cardenas. A tropical storm warning was posted from Acapulco to Tecpan.