Forecasters said that even if Raymond stayed offshore, the storm could dump heavy rain and cause life-threatening flash floods and mudslides along the south-central Mexican coast.
“There will be rain for the next 72 hours along the Pacific coast — very heavy rain, torrential rain,” Korenfeld said.
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.
Authorities in Guerrero, where Manuel caused about 120 deaths from flooding and landslides in September, closed seaports, set up 700 emergency shelters and urged residents in risk areas to take precautions.
The state cancelled classes in most coastal communities west of Acapulco, including Zihuatanejo. Schools are often used as emergency shelters in Mexico.
The potential for damage from such rains was high. About 50 dams in the area were over capacity, and officials were releasing water to make room for expected rainfall.
Some villages high in the mountains of Guerrero were still without electricity and phone service following Manuel.