Mexico's southern coast braced for Hurricane Otis on Wednesday as the Category 5 storm made landfall near the beach resorts of Acapulco, with the potential to cause "catastrophic damage," the U.S. National Hurricane Center (NHC) said.
The hurricane reached land near Acapulco, bringing maximum sustained winds around 270 kmh and heavy rain, the center said.
The storm could bring up to 51 cm of rain in parts of Guerrero and Oaxaca, with the possibility of flash floods and mudslides, a "potentially catastrophic" storm surge, and "life-threatening" surf and rip current conditions, authorities said.
Mexico's national water agency CONAGUA warned of six-to-eight-meter surf off Guerrero state, home to Acapulco, and also off parts of Oaxaca state.
By 9 pm on Tuesday (0300 GMT), Otis was about 55 miles south-southeast of Acapulco and blowing maximum sustained winds of 257 kph, the Miami-based NHC added.
In Guerrero, authorities were preparing storm shelters and the national guard said it was helping to prepare for rescues and evacuations.
The defence ministry enacted a disaster plan ahead of the storm's arrival, President Andres Manuel Lopez Obrador said on social media late on Tuesday, as soldiers patrolled Acapulco's emptying beaches.
Schools across Guerrero canceled classes for Wednesday ahead of Otis' arrival, Governor Evelyn Salgado said on social media.


Trump adds seven countries to full travel ban list
Indian parliament votes to allow private firms in nuclear power sector
Doctors in England start five-day walkout during flu surge
Israeli settler kills 16-year-old Palestinian in West Bank, mayor says
Paris' Louvre reopens partially but staff vote to extend strike
Delhi restricts vehicles, office attendance in bid to curb pollution
India summons Bangladesh envoy over security concerns in Dhaka
Alleged Bondi gunman charged with 15 murders as funerals of victims begin
