ACAPULCO, Mexico (AP) — Hurricane Otis slammed into Mexico’s southern Pacific coast as a catastrophic Category 5 hurricane early Wednesday, bringing dangerous winds and heavy rain to Acapulco and surrounding towns, stirring memories of a 1997 storm that killed dozens of people.

A strong Category 2 storm by Wednesday morning, the hurricane was expected to continue to weaken quickly in Guerrero state’s steep mountains. But the five to 10 inches (13 to 25 centimetres) of rain forecast, with as much as 15 inches (38 centimetres) possible in some areas, raised the threat of landslides and floods.

Otis was about 60 miles (100 kilometres) north-northwest of Acapulco with its maximum sustained winds decreasing to 110 mph (175 kph) and moving at 10 mph (17 kph). The centre of Otis is expected to move farther inland over southern Mexico through Wednesday night.

Mexican authorities provided no immediate damage assessments as heavy rain continued to pound the area, but local media reported widespread power outages across Acapulco.

A long convoy of trucks from the national electric company moved through the Guerrero state capital Chilpancingo before dawn Wednesday toward Acapulco.

Otis had strengthened rapidly, going from a tropical storm to a Category 5 hurricane in 12 hours Tuesday. Residents of Guerrero’s coast scrambled to prepare, but the storm’s sudden intensity appeared to catch many off guard.

“We’re on maximum alert,” Acapulco Mayor Abelina López said Tuesday night as she urged residents to hunker down at home or move to the city’s shelters.

Videos from hotel guests in Acapulco posted to X, formerly known as Twitter, as the storm came ashore showed blinding horizontal rain and howling winds.

In one, white towels danced high above a hotel’s cavernous courtyard like sheets of paper and bed mattresses trembled on balconies, apparently an effort to blunt the storm’s winds. Another showed wind and rain howling unimpeded down hotel hallways. While in still another, a family huddled inside a hotel room shower to escape breaking windows and fierce wind.

Otis is stronger than Hurricane Pauline that hit Acapulco in 1997, López said. Pauline destroyed swaths of the city and killed more than 200 people. Hundreds of others were injured in flooding and mudslides.

Between the internationally known resorts of Acapulco and Zihuatanejo are two dozen small towns and villages perched between the mountains and the ocean.

Otis’ arrival came just days after Hurricane Norma struck the southern tip of Mexico’s Baja California Peninsula to the north.

Acapulco is a city of nearly one million people at the foot of steep mountains. Luxury homes and slums alike cover the city’s hillsides with views of the glistening Pacific. The city had opened two dozen shelters in the hours before Otis made landfall.