Hurricane Erick has become an “extremely dangerous” Category 4 storm, hours before it is expected to pummel Mexico’s Pacific coastline, the United States National Hurricane Center (NHC) has said.

In its latest bulletin, the meteorological centre said Erick could grow even more powerful before making landfall in the eastern part of Guerrero state and the western part of Oaxaca state on Thursday morning.

The major storm, which is travelling to the northwest at a rate of 15km/h (nine mph), will unleash destructive winds, flash floods and a dangerous storm surge, forecasters have predicted.

As it neared Mexico, the NHC reported that the hurricane’s maximum sustained winds had increased to about 230km/h (145mph), putting it within the Category 4 wind speed range of 209-251km/h (130-156mph).

The NHC warned that Erick could unleash up to 16 inches (40cm) of rain on Oaxaca and Guerrero, bringing the risk of “life-threatening flooding and mudslides, especially in areas of steep terrain”.

The Mexican states of Chiapas, Michoacan, Colima and Jalisco could also be hit by up to 6 inches of rainfall, the Miami-based centre added.

Late on Wednesday, Erick’s projected path was revised, as it is headed closer to the resort city of Puerto Escondido in Oaxaca. A hurricane warning is in place for the entire coastal area between Acapulco and Puerto Angel.

Mexican authorities have scrambled to prepare residents and tourists ahead of Erick’s arrival. In a video message on Wednesday night, President Claudia Sheinbaum urged people to stay at home or move to shelters if they were in low-lying areas.

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Some 2,000 temporary shelters have been set up in the states of Chiapas, Guerrero and Oaxaca to house those who have to leave their homes.

Meanwhile, Guerrero Governor Evelyn Salgado said that schools in her state would stay closed, and that fishing and tourism operators had been told to make their boats storm ready.

Residents in the Guerrero resort of Acapulco were among those steeling themselves for Erick’s landfall.

The city of almost one million people was devastated in October 2023 by Hurricane Otis, which killed at least 52 people and destroyed many homes and businesses.

Carlos Ozuna Romero, 51, lost his restaurant at the edge of an Acapulco beach in the 2023 hurricane. On Wednesday, he oversaw workers as they stored tables and chairs in preparation for the new storm.

“Authorities’ warnings fill us with fear and obviously make us remember everything we’ve already been through,” he said.

Elsewhere in the city, Veronica Gomez, a 40-year-old shipping company worker, suggested the city was much better prepared this time. “Now it’s not going to catch us by surprise,” she said.

Erick is likely to rapidly weaken as it reaches the mountains, and it is predicted to dissipate on Thursday night or early Friday, according to the NHC.