A tropical storm has rapidly evolved into a Category 5 hurricane off the southwestern coast of Mexico, a transformation occurring in less than 24 hours. The storm, named Polo, is being driven by intense El Niño weather patterns in the Pacific Ocean. As of Tuesday, the hurricane was generating maximum sustained winds of 165mph (266km/h) while located approximately 215 miles (346km) south of the coastal city of Zihuatanejo in Guerrero state.
Polo began as a tropical storm on Monday, with wind speeds measured at less than 74mph (120km/h). Meteorologists attribute this sudden, extreme growth to the current "super El Niño," which set a record on Monday as the most extreme on record, influencing global weather events. National Hurricane Center forecasters in Miami have indicated that while a direct hit on Mexico is unlikely, the storm may continue to intensify. Officials have issued warnings regarding the potential for life-threatening flooding, inland mudslides, dangerous surf, and rip current conditions.
The El Niño phenomenon, characterized by rising ocean temperatures in the central and eastern Pacific near the equator, continues to impact global weather basins. Experts note that while the current conditions are suppressing storm development in the Atlantic—which has seen no hurricanes so far this season—they are fostering increased activity in the Pacific. According to AccuWeather lead long-range meteorologist Paul Pastelok, water temperatures in the north-central Pacific and off the Mexican coast are well above historical averages, creating high wind shear that limits Atlantic storms while keeping the Pacific basin highly active.
Brian McNoldy, a senior research associate at the University of Miami, noted that the current El Niño is forecast to become the strongest on record by late fall and winter. Polo is the 18th named storm and the seventh hurricane of the 2026 Pacific season, which spans from May 15 to November 30. Conversely, the Atlantic basin has recorded only six named storms and zero hurricanes, marking the first time in 112 years that no hurricanes have formed in the region by September 21.
