Hurricane Willa makes landfall in Mazatlan, Mexico, on Tuesday, October 23, 2018 (Photo: AP)

Emergency workers on Wednesday were struggling to reach beach towns left incommunicado by a blow from Hurricane Willa, and rains from the storm continued to force evacuations due to fear of flooding even as it dissipated over northern Mexico.

There were no immediate reports of deaths, but the storm’s 120 mph (195 kph) winds knocked out power and damaged buildings in the Sinaloa state municipality of Escuinapa, and local news media published images of a damaged hospital.

The town mayor, Hugo Moreno, said rescue workers were still trying to communicate with several seaside communities.

In neighboring Nayarit state, Gov. Antonio Echevarria asked the federal government to send a helicopter, boats, rescue equipment, and said the state is trying to evacuate people in communities at risk of flooding.

Before hitting the mainland near Isla del Bosque in Sinaloa Tuesday evening, Willa swept over an offshore penal colony about 60 miles (100 kilometers) out in the Pacific. Authorities declined to comment on precautions that were taken at the prison, citing security concerns, but said the safety of inmates was a priority.

The US National Hurricane Center said the storm rapidly lost force and dissipated over northern Mexico Wednesday morning.

It peaked as a Category 5 storm with winds of 55 mph (250 kph) over the Pacific on Monday.

Still, concern about the rains led Durango state to say it was evacuating 200 people threatened by possible spills from the Santa Elena dam. In Nayarit, the fire department asked residents in villages around the Acaponeta river to “evacuate immediately” as the river rose to dangerous levels.

Willa came ashore about 50 miles (80 kilometers) southeast of Mazatlan, a resort city that is home to high-rise hotels and about 500,000 people, including many US and Canadian expatriates.

Torrential rains began in the afternoon, and emergency officials said they had evacuated more than 4,250 people in coastal towns and set up 58 shelters ahead of the storm. Schools were ordered closed.

As Willa neared, the beach in Mazatlan almost disappeared, with waves slamming against the coastal boulevard under looming black clouds. A few surfers enjoyed the big waves while the streets onshore were nearly deserted except for workers boarding up windows at hotels, shops and homes.