Hurricane Patricia will reportedly be "powerful enough to lift up cars" and "destroy homes that are not sturdily built with cement and steel", according to officials at Mexico's meteorological service.
Roberto Ramirez, director of the country's National Water Commission, said those in the most danger from the hurricane will be people on the coast, especially in the state of Jalisco, and warned the storm would have the strength to "drag along people caught outside" when it hits.
The force of Hurricane Patricia - one of the strongest storms ever recorded - has been revealed in a series of eyewitness videos.
Hurricane Patricia looks set to be the most powerful hurricane ever recorded, with winds expected to top 200 mph.
The National Hurricane Centre in Florida has marked Hurricane Patricia 'catastrophic'.