Tropical Storm Newton has grown into a hurricane as it rushed toward Mexico's popular northwest resorts of Los Cabos, two years after powerful Odile wreaked havoc in the region.
The US National Hurricane Centre (NHC) warned that "preparations to protect life and property should be rushed to completion" in parts of the Baja California peninsula and that Newton would make landfall on Tuesday.
The Mexican government issued hurricane warnings for the west coast of the state of Baja California Sur as well as Cabo San Lucas in its southern tip, a favoured destination of American tourists.
The Mexican government issued hurricane warnings for the west coast of the state of Baja California Sur as well as Cabo San Lucas in its southern tip, a favoured destination of American tourists.
The Miami-based centre said the eye of the storm was located about 215 miles (350 kilometres) southeast of Cabo San Lucas, with top winds of 75 miles per hour. It was moving northwestward at 16 miles per hour.
The hurricane is expected to be near or over the southern tip of the peninsula on Tuesday, US forecasters said.
Newton was expected to pick up more steam before making landfall.
"Winds are expected to first reach tropical storm strength by late tonight, making outside preparations difficult or dangerous," the NHC said in a 2100 GMT bulletin.
More From This Section
The storm is expected to produce as much as 10 inches (25 centimetres) of rain in several Pacific coast states, which could trigger life-threatening flash floods and mudslides, the centre said.
A "dangerous" storm surge was expected to cause significant coastal flooding, it added.
Los Cabos was pummeled in September 2014 by Hurricane Odile, which left six people dead and millions of dollars in damage.
The weather system already caused damage in the south over the weekend before it became a tropical storm, with heavy rains blamed for three deaths in the southern state of Chiapas.
Floods and landslides damaged or affected some 70 homes and schools and trapped around 200 people in Acapulco, the resort in the southwestern state of Guerrero.
Torrential rains that began Saturday morning caused 33 landslides on highways in Guerrero.
Heavy rainfall trapped around 200 people in their housing complex, prompting air evacuations by police, marines and the army.
While western Mexico was getting hammered with precipitation, the United States was spared the worst when Tropical Storm Hermine crashed ashore in Florida — a hurricane at the time — before moving out to sea.
The hurricane centre warned that the post-tropical cyclone would cause a storm surge and tide that could flood normally dry areas in the northeastern United States.