Hurricane Simon strengthens to Category 4 off Mexico as Puerto Vallarta prepares

What happened

Hurricane Simon has rapidly strengthened into a Category 4 storm off Mexico's Pacific coast, carrying maximum sustained winds of 150 mph (240 km/h) as it heads towards a destructive landfall.

The US National Hurricane Center said the hurricane was centred about 115 miles (185 km) south-southwest of the major port of Manzanillo on Saturday morning, moving north. Forecasters warned that Simon could intensify further before approaching or pushing inland across the west-central coast late on Saturday or early Sunday.

A hurricane warning covers stretches of the coast south of the resort city of Puerto Vallarta, including Manzanillo and the offshore Islas Marias archipelago. A tropical storm watch extends farther south towards Lazaro Cardenas.

How Puerto Vallarta and coastal towns are preparing

In Puerto Vallarta, shopkeepers spent Saturday putting up storm shutters and stacking sandbags across doorways along the oceanfront boardwalk. Local authorities instructed residents to stay indoors and seek shelter from 5:00 pm local time.

Jalisco state authorities suspended school classes for Friday and Monday across 22 coastal municipalities and urged tourism operators in Puerto Vallarta to ensure both staff and holidaymakers could reach designated refuges. Precautionary evacuations also began in Cihuatlan, a low-lying municipality near the Colima state border prone to river surges.

Residents along the waterfront drew comparisons to previous disasters. "What people are most scared of is that the water will reach a tall height, like it did with Hurricane Kenna," said Paulina Perez, a boutique owner on the Puerto Vallarta promenade, recalling the deadly 2002 storm. Nearby, shopfronts carried boarded signs reading, "Simon, be brief, be peaceful."

Further south, the Mexican Navy evacuated around 100 residents from vulnerable coastal communities. In Manzanillo, civil protection teams raised red and black warning flags, shut beaches to visitors and deployed military and National Guard patrols as rising waves reached the entrances of seafront hotels.

Rainfall and flood risks

Meteorologists warned that the hurricane's rapid growth makes it especially dangerous for settlements nestled between the ocean and steep coastal mountains. AccuWeather meteorologist Dan Pydynowski noted that beyond wind damage, washed-out roads and landslides could cut off vulnerable towns for days.

The US National Hurricane Center projected rainfall of 10 to 20 inches (25 to 51 cm) across south-western Mexico through Sunday, with isolated pockets in Jalisco, Colima and Michoacan receiving up to 30 inches (76 cm). Downpours linked to Simon's outer bands have already triggered street flooding in Acapulco.

Forecasters also warned of life-threatening storm surges near and immediately east of where the eye makes landfall, alongside destructive ocean swells expected to batter the coast well into next week.