Climate change may have played a greater role than El Niño in strengthening Hurricane Polo, according to a new scientific analysis reported by the Associated Press on October 15, 2026. The study examined how rising global temperatures influenced the storm's unusually powerful conditions in the Pacific Ocean.
Hurricane Polo attracted scientific attention after becoming the longest-lasting Category 5 storm recorded in the Pacific, according to the report. Researchers said unusually warm ocean temperatures helped the storm intensify rapidly, highlighting growing concerns about the influence of global warming on powerful tropical cyclones.
What Did Scientists Discover About Hurricane Polo?
Researchers from World Weather Attribution and Climate Central investigated the roles of human-caused climate change and El Niño in Hurricane Polo's intensity.
Their analysis estimated that climate change added approximately 6 miles per hour to the storm's peak winds, while El Niño contributed around 5 miles per hour. These figures are estimates from the study rather than direct measurements of how the storm would have behaved in a different climate.
The researchers also estimated that climate change made the conditions associated with the storm about 23 times more likely. The study attributed a substantial increase in the likelihood of similar conditions to El Niño as well, although the researchers' estimates depend on their modelling methods and assumptions.
Why Did Hurricane Polo Become So Powerful?
Tropical cyclones draw energy from warm ocean water. When sea-surface temperatures are unusually high, the atmosphere can receive additional heat and moisture, helping favourable storms strengthen.
The analysis highlighted ocean temperatures that were as much as 3.6 degrees Fahrenheit, or approximately 2 degrees Celsius, above average in the areas examined.
According to the report, Hurricane Polo intensified from a tropical storm to a Category 5 hurricane within about 24 hours. Such rapid intensification can make preparation difficult because a storm's strength may increase dramatically in a short period.
Climate Change and El Niño Are Different Factors
Climate change and El Niño can both influence ocean and atmospheric conditions, but they are not the same phenomenon.
El Niño is a natural climate pattern associated with changes in Pacific Ocean temperatures and atmospheric circulation. Human-caused climate change, by contrast, is primarily driven by the long-term accumulation of heat-trapping greenhouse gases in the atmosphere.
The researchers compared the influence of these factors to assess their relative contribution to the conditions surrounding Hurricane Polo. Their findings suggest that long-term global warming can increase the intensity of extreme weather even when natural climate patterns are also active.
What Does Rapid Intensification Mean for Coastal Communities?
Rapidly intensifying hurricanes can create serious challenges for emergency services and coastal communities. A storm that strengthens quickly may leave residents and authorities with less time to prepare, secure buildings or organise evacuations.
Powerful hurricanes can bring destructive winds, heavy rainfall, flooding and dangerous coastal conditions. The actual impact depends on the storm's path, size, speed, rainfall and whether it makes landfall near populated areas.
In Hurricane Polo's case, the AP report said the storm weakened before reaching a sparsely populated area of Mexico. Its development nevertheless provided researchers with an opportunity to examine how climate conditions can influence extreme storms.
Does This Mean Every Hurricane Will Become Stronger?
No. The findings do not mean that every hurricane will reach Category 5 intensity or that every storm will follow the same pattern.
Tropical cyclone behaviour depends on several factors, including ocean temperatures, wind shear, atmospheric moisture and large-scale weather patterns. Climate change influences the background conditions in which storms develop, but the effects vary from storm to storm and from region to region.
Scientists use climate models and event-attribution studies to estimate how human-caused warming changes the likelihood or intensity of particular weather events. These studies provide evidence about risk, but they cannot determine every detail of an individual storm's development.
Important Limitations of the Study
The analysis reported by the Associated Press was described as a rapid scientific assessment and had not yet undergone peer review at the time of reporting.
That distinction matters because peer review allows other specialists to examine a study's methods, assumptions and conclusions before publication in a scientific journal. The findings offer useful evidence, but their estimates should be interpreted with appropriate caution.
Further research and independent scientific scrutiny can help clarify the relative influence of climate change and natural climate variability on storms like Polo.
Why This Research Matters for the Future
Understanding the relationship between global warming and extreme storms can help governments improve forecasting, disaster preparation and coastal resilience.
Communities can reduce some risks through better early-warning systems, evacuation planning, stronger infrastructure and effective emergency communication. These measures cannot prevent hurricanes, but they can help limit damage and protect lives.
Reducing greenhouse gas emissions is also important for limiting additional long-term warming. At the same time, communities must prepare for the extreme weather risks that already exist.
Conclusion
The Hurricane Polo analysis adds to scientific efforts to understand how climate change affects powerful tropical storms. Researchers estimated that global warming contributed more to the storm's peak winds than El Niño did, while unusually warm ocean conditions supported its rapid intensification.
The study is not a prediction that every future hurricane will become more extreme. Instead, it highlights why scientists are investigating how a warming climate can change the risks associated with dangerous weather events.
Journalist: Vijay Singh