Hurricane Polo intensifies to Category 5, threatens Mexico's Pacific coast

Hurricane Polo had grown into something rare and terrifying by Tuesday evening—a Category 5 cyclone with sustained winds of 175 miles per hour, churning in the Pacific Ocean 215 miles south of Zihuatanejo, Mexico. The National Hurricane Center, monitoring the storm from Miami via aircraft sent directly into its core, called it "extremely dangerous." It was the third Category 5 hurricane of the Pacific season, a distinction that placed it among only a handful of storms to reach such intensity in the region over recent decades.

The speed of Polo's transformation had caught scientists off guard. In the span of just 24 hours, the hurricane had intensified in what the National Hurricane Center described as "truly remarkable" fashion. Philip Klotzbach, a research scientist at Colorado State University's Department of Atmospheric Science, traced the cause to El Niño—the same weather pattern that had already brought crippling droughts to Mexico and Central America. In the Pacific basin, El Niño had warmed the waters and shifted wind patterns in ways that created ideal conditions for hurricane development. "There are all the ingredients that hurricanes need to get really strong really fast," Klotzbach said. The comparison that haunted meteorologists and residents alike was Hurricane Patricia, which in 2015 had reached 215 miles per hour. Polo's 175 mph winds placed it in that rarefied company, prompting Kristen Corbosiero, a professor at the University at Albany's Department of Atmospheric and Environmental Sciences, to call it "one of the strongest storms ever" to form in the Pacific Basin.

For Mexico's southwestern coast, the storm revived traumatic memories. Hurricane Otis had torn through the port city of Acapulco in 2023, killing dozens and leaving destruction in its wake. Much of that devastation had been attributed to how quickly Otis intensified—residents had little time to secure boats, evacuate, or prepare. Now, as Polo approached the same region, Mexican authorities moved with urgency. President Claudia Sheinbaum said in her morning briefing that experts believed the hurricane would likely skirt the coast rather than make direct landfall, but the margin for error was thin. Mexico's navy shut down ports in Guerrero and Michoacán states. Classes were suspended across multiple areas. Beaches that would normally be crowded emptied out as dark clouds gathered above choppy seas.

The threat, even without a direct hit, remained severe. The U.S. Embassy in Mexico issued a weather alert warning citizens to avoid water and beaches and to follow Mexican authorities' guidance. Heavy rain—between 3 and 6 inches forecast for Guerrero and Michoacán, with smaller amounts possible across Oaxaca, Colima, and Jalisco—could trigger life-threatening flooding and mudslides. Rough seas would bring hazardous conditions: rip currents and rogue waves capable of killing swimmers and boaters. Strong winds would add to the danger.

Poло was expected to move in a generally west-northwestward direction over the coming days, potentially sparing the coast a direct strike but leaving the region braced for whatever peripheral damage a storm of such power might inflict. Elsewhere in the Pacific, Tropical Storm Odalys was tracking toward hurricane strength with 70 mph winds. In the Atlantic, the season had set an unusual record: no hurricanes had formed yet, a delay attributed to El Niño's suppressive effects on Atlantic storm development. But in the Pacific, where conditions favored rapid intensification, the season was proving relentless.