{
  "id": 9393919,
  "title": "How did Hurricane Polo get so powerful?",
  "url": "https://urgent.news/2026/09/23/how-did-hurricane-polo-get-so-powerful",
  "topic": "world",
  "section": "World",
  "published": "2026-09-23T18:46:21.000Z",
  "source": {
    "name": "Live Science",
    "slug": "live-science",
    "url": "https://www.livescience.com/planet-earth/how-did-hurricane-polo-get-so-powerful"
  },
  "original_language": "en",
  "account": "Hurricane Polo underwent a rapid intensification, transforming from a tropical storm into a powerful Category 5 hurricane within 24 hours on September 22. Currently off the southwest coast of Mexico, the storm has been downgraded to a Category 4 but remains extremely potent. The National Hurricane Center (NHC) predicts torrential rainfall along Mexico's southwest coast as Polo drifts northwest. While a direct landfall is unlikely, heavy rain could cause life-threatening flooding and mudslides, along with hazardous ocean conditions.\n\nWhat causes a hurricane like Polo to intensify so quickly? Environmental scientist and researcher Julian Heming from the U.K.'s Met Office explained that rapid intensification occurs when tropical cyclones are exposed to high sea temperatures, low wind shear, and upper air conditions that facilitate rapid air escape from the storm's top. During Polo's rapid intensification, it moved over exceptionally warm Pacific waters created by an extremely strong \"super\" El Niño that began in June. El Niño is a naturally occurring climate pattern in the tropical Pacific Ocean, typically occurring every two to seven years. It begins with unusually warm waters in the eastern tropical Pacific, which the National Oceanic and Atmospheric Administration (NOAA) identifies as El Niño when these waters are at least 0.9 degrees Fahrenheit (0.5 degrees Celsius) above average, accompanied by changes in winds, surface pressure, and rainfall.\n\nA \"super\" El Niño, characterized by sea surface temperatures higher than 2C above normal, contributed significantly to Hurricane Polo's rapid intensification. Such conditions supplied the storm with abundant heat and moisture while providing very moist air and weak higher-level winds that enabled thunderstorms to organize and strengthen without disruption. Polo also developed a compact, well-defined core, which concentrated the storm's energy into a small area, further enabling exceptional rapid strengthening. The combination of these factors created an efficient atmospheric \"heat engine\" that allowed Polo to grow at an unprecedented rate.",
  "summary": "Hurricane Polo exploded from a tropical storm into a powerful Category 5 hurricane in less than 24 hours on Tuesday.",
  "key_points": [
    "Hurricane Polo intensified from tropical storm to Category 5 in 24 hours on September 22",
    "Rapid intensification fueled by super El Niño with sea surface temps 2C above normal",
    "Compact core allowed storm energy to concentrate, enabling exceptional strengthening"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}