Hurricane Patricia weakened to a Category 4 storm Friday night with maximum sustained winds of 130 mph, but remained "extremely dangerous" over southwestern Mexico, the National Hurricane Center said. Patricia made landfall hours earlier as a Category 5 storm, the fiercest.

[Previous story, published at 10:24 p.m. ET]

(CNN) -- Hurricane Patricia -- the strongest hurricane ever recorded -- made landfall on Mexico's Pacific coast Friday evening, its 165 mph winds barreling into southwestern Mexico near Cuixmala, officials said.

The monster storm touched down about 6:15 p.m., hours after weakening slightly with sustained winds decreasing to 190 mph and gusts to 235 mph, according to the U.S National Weather Service.

Even then, Patricia lashed the coast with fierce winds and rain as residents and tourists in resorts such as Puerto Vallarta and Manzanillo sought shelter.

Patricia landed about 55 miles west-northwest of Manzanillo, home to the largest container port on Mexico's Pacific seaboard.

Taking the brunt of the hurricane are small fishing villages about 130 miles south of Puerto Vallarta, which had braced for potentially catastrophic 200 mph sustained winds and torrential rains. Despite the slight weakening, damage from the Category 5 storm is expected to be devastating.

Less than an hour after its arrival, Patricia churned inland over southwestern Mexico with maximum sustained wind speeds of 160 mph and was still "extremely dangerous," according to the American weather service.

Patricia hit luxury resorts and impoverished fishing villages with equal ferocity.

It struck land near Cuixmala, a 25,000-acre private estate of beach, jungle, nature reserve and fruit plantations that was once home to the late British billionaire James Goldsmith, according to the estate's website. Its Moorish-style villas, with rates starting at $900 a night, have hosted visitors such as Richard Nixon and Ronald and Nancy Reagan.

"I'm a little worried," said Carlos Cisneros, an estate worker staffing the phones Friday night. "The rain is intense and the wind picks up at times for about five minutes, then subsides. It comes and goes."

Cisneros said there were mandatory evacuations in nearby communities where landslides are possible, but he and others at the sprawling estate had to come to work.

"It's not so bad right now," said Cisneros, a receptionist at a nearby sister property, Hacienda de San Antonio. "I took a risk."

Anthony Perez, a representative of Save the Children in Mexico City, said Patricia will be a huge challenge for Mexico's government.

"We have these wonderful luxurious tourist destinations but then there's half the population that's living in different degrees of poverty," he said.

"A lot of these homes, especially in the rural areas, are made of flimsy materials, and with the wind being so strong and then there being so much rain, the potential for landslides. Many of these families will probably be losing everything."

Mexico's National Commission for Water, CONAGUA, said the eye of Patricia has a diameter of 10 kilometers, or 6.21 miles.

President Enrique Peña Nieto, in a tweet, said: "Hurricane Patricia is on the coast of Mexico. Do not go outside. Protect yourselves and follow instructions from Civil Protection. I am thinking of you all."

The excessive wind speeds, according to the head of the Mexican agency that includes its national weather service, could make Patricia the most dangerous storm in his nation's history.

"The hurricane is so big and so intense that it has the capacity to pass over both the Sierra Madres in our country -- that is, through our most mountainous ranges -- and then exit the country on the other side into the north part of the Gulf of Mexico and possibly the United States," CONAGUA director Robert Ramirez de la Parra said.

The closest contender to its size, at this point, might be Hurricane Camille, which battered the U.S. Gulf Coast in 1969. Patricia looks to be more powerful than that storm, as well as stronger than Hurricane Andrew in 1992, Katrina in 2005 and many others.

It already has surpassed them in one way: its central pressure reading -- the weight of the air above a system -- which is a key measure of any storm's strength.

The midday Friday central pressure recording of 879 millibars (the barometric pressure equivalent is 25.96 inches) "is the lowest for any tropical cyclone globally for over 30 years," according to the Met Office, Britain's weather service.

#Patricia is currently comparable to #Haiyan in intensity. This is a very dangerous hurricane https://t.co/Ebc8eP7B2J — WMO | OMM (@WMOnews) October 23, 2015

Life-threatening flash floods, surf

In addition to powerful winds, concerns are high about dangerous storm surges like those that overran the Filipino city of Tacloban during Haiyan. The National Hurricane Center warned about those, as well as swells that "are likely to cause life-threatening surf and rip-current conditions."

"Residents in low-lying areas near the coast in the hurricane warning area should evacuate immediately, since the storm surge could be catastrophic near and to the east of where the center makes landfall," the U.S. agency said of Patricia.

Rainfall of 8 to 12 inches -- and possibly 20 inches in some spots -- "could produce life-threatening flash floods and mudslides," according to the U.S. weather agency.

All that adds up to millions of people under threat, some of them tourists who'd gone to the coast to get away.

Mexican authorities take preventive measures

Mexican authorities responded with a full-court press Friday to get the word out, as well as to get resources deployed to the right places ahead of the storm.

In a meeting that started Thursday night and extended into Friday morning, Peña Nieto directed members of his Cabinet to take immediate action in the face of what was then predicted to be the strongest hurricane in the eastern Pacific in the past 50 years, according to the official Notimex news agency.

The most dire warnings went to the states of Jalisco, Colima, Nayarit, Michoacan and Guerrero, where people were told to get ready by heading to shelters, staying home from school or doing what they could to be safe wherever they are. The Mexican presidency noted, via Twitter, that waterspouts and tornadoes could pop up as Patricia rampages through.

Photos: Hurricane Patricia Debris left by Hurricane Patricia litters the Chamela community in the state of Jalisco, Mexico, on Saturday, October 24. Patricia weakened over north-central Mexico, dumping heavy rain that triggered flooding and landslides. By late Saturday afternoon, Patricia had degenerated into a remnant area of low pressure, according to the U.S. National Hurricane Center. Hide Caption 1 of 22 Photos: Hurricane Patricia A truck sits covered in tree branches on October 24 in Cuastecomates, Mexico. Hide Caption 2 of 22 Photos: Hurricane Patricia Mexican soldiers patrol looking for people in need of help in the El Rebalse community in Jalisco state, Mexico, on October 24. Hide Caption 3 of 22 Photos: Hurricane Patricia Firefighters set a line to pump water out from a flooded area in Cihuatlan, Mexico, on October 24. Hide Caption 4 of 22 Photos: Hurricane Patricia A dog sits outside a flooded house on October 24 in Zoatlan, Mexico. Hide Caption 5 of 22 Photos: Hurricane Patricia Soldiers evacuate residents to a shelter in Zoatlan on October 24. Hide Caption 6 of 22 Photos: Hurricane Patricia Men work to restore downed power lines on October 24 in Melaque. Hide Caption 7 of 22 Photos: Hurricane Patricia A worker cleans out the Monterey Hotel on October 24 in Melaque, Mexico. Hide Caption 8 of 22 Photos: Hurricane Patricia Mexican soldiers remove sand from the street in Manzanillo, Colima state, on Saturday, October 24, after Hurricane Patricia hit the coast of neighboring Jalisco state. Hide Caption 9 of 22 Photos: Hurricane Patricia A truck driver braves a flooded street leading into Tecomán, Colima state. Hide Caption 10 of 22 Photos: Hurricane Patricia Rains from Hurricane Patricia arrive in Puerto Vallarta on Friday, October 23. Hide Caption 11 of 22 Photos: Hurricane Patricia Hurricane Patricia approaches the Pacific coast of Mexico in this photo that astronaut Scott Kelly tweeted from the International Space Station on Friday, October 23. Patricia is the strongest hurricane ever recorded at sea, with sustained winds of 200 mph. Hide Caption 12 of 22 Photos: Hurricane Patricia The Grand Velas Nayarit, a hotel in Puerto Vallarta, Mexico, is moving all of its guests to a "shelter" on the first floor of the hotel, vacationer Brad Powles told CNN. Hide Caption 13 of 22 Photos: Hurricane Patricia An airline employee walks around the empty airport in Puerto Vallarta, where all flights were canceled on October 23. Hide Caption 14 of 22 Photos: Hurricane Patricia A man boards up a waterfront business in Puerto Vallarta on October 23. Hide Caption 15 of 22 Photos: Hurricane Patricia Residents fill sandbags to protect beachfront businesses in Puerto Vallarta on October 23. Hide Caption 16 of 22 Photos: Hurricane Patricia People line up to buy food and water in Puerto Vallarta on October 23. Hide Caption 17 of 22 Photos: Hurricane Patricia People in Puerto Vallarta walk past a shop with taped windows on Thursday, October 22. Hide Caption 18 of 22 Photos: Hurricane Patricia People evacuate Boca de Pascuales on October 22. Hide Caption 19 of 22 Photos: Hurricane Patricia People break down their souvenir shop in Puerto Vallarta on October 22. Hide Caption 20 of 22 Photos: Hurricane Patricia Residents of Boca de Pascuales, Mexico, leave the village on October 22. Hide Caption 21 of 22 Photos: Hurricane Patricia Police patrol the beach in Boca de Pascuales on October 22. Hide Caption 22 of 22

Mexican officials said over 1,780 shelters had been set up for more than 240,000 people and that a 50,000-strong force had been mobilized in Jalisco, Colima and Nayarit. In addition, about 4,000 Mexican navy officers have been dispatched to areas expected to bear the brunt of Patricia's wrath.

All flights to and from the airports in Puerto Vallarta and Manzanillo were suspended, and all banks in certain locales shut down at noon, according to Mexico's civil protection agency.

That agency noted the gas company PEMEX planned to suspend all gas sales in the cities of Manzanillo and Colima, while the Comision Federal de Electricidad planned to cut off electricity -- as a precaution -- at 1 p.m. (2 p.m. ET) in cities in Colima, Jalisco and Nayarit.

Some hotels in Puerto Vallarta were evacuated, though others -- like the Comfort Inn, where manager Samuel Ruic said windows were being boarded up with tape -- were not. And locals did what they could by boarding up windows and piling up sandbags along beaches in places such as Manzanillo in hopes of blunting what's expected to be a colossal storm surge.

Ahí viene el agua #Patricia #Manzanillo A photo posted by formerfrank (@formerfrank) on Oct 22, 2015 at 5:41pm PDT

Ramirez de la Parra, the Mexican official, warned people not to get complacent as the storm passes. That's especially true for those who end up in the storm's eye, where there often is "apparent calm."

"It's the walls of the (hurricane's) eye where you can find the (greatest) wind intensity," he said. "... The heaviest damage is after the hurricane passes. We must wait until (the passage of) the entire body of the hurricane in order to call off the preventive (measures)."

Barbara Myatt, who has lived in Puerto Vallarta for more than a decade, waited out the storm with friends at a golf course complex four blocks from the ocean late Friday afternoon.

"We have some light rain," she told CNN International. "It's cloudy. There's no wind and everything is very calm."

The expected magnitude of the hurricane took residents by surprise, she said.

"We weren't prepared for this," she said by phone. "We didn't think it was going to be strong. Now they're saying it's catastrophic. I hope we're safe."

El Nino contributes to storm's strength

One other thing alarming about Patricia is its rapid rise in intensity. It rated as a tropical storm early Thursday, but 24 hours later it had become a Category 5 hurricane.

The storm is expected to roll over Mexico's Sierra Madre, its intense winds likely dulling rapidly in the process. But much of the system's precipitation could roll on into the Gulf of Mexico before making its way up to Louisiana, Arkansas and Texas, states already enduring heavy rains from another system.

Still, while the Patricia-related rainfall could be significant in the United States, it pales to what people in Mexico will experience.

Storms are not unusual there, but Patricia is special, in part because of the global, regular weather phenomenon known as El Niño

Among other effects, El Niño has contributed to ocean waters off Mexico being 2 to 3 degrees warmer than usual.

"That warm water from El Niño probably just pushed this slightly over the edge to be the strongest storm on record," CNN's Myers said.

About the only good news about Patricia, as of early Friday afternoon, was that its center was fairly compact, with hurricane-force winds only extending 35 miles out from its eye.

That's a plus for anyone who gets brushed by the hurricane, but no consolation for those who get hit directly.

"That's almost like an F4 or F5 tornado that can be 5 or 6 miles wide, just tearing up the coast as it makes landfall," said Myers. "... Can you imagine being the center of this eye, ... and then get hit by the eye wall doing 200 mph?

"It will be a devastating blow."