Researchers are monitoring the start of a new El Niño event that may become record-breaking and are debating whether climate change is contributing to its intensity. Multiple scientists cited in coverage describe uncertainty about how much of El Niño’s strength can be attributed to natural variability versus the influence of a warming climate. The discussion centers on how higher global temperatures affect ocean and atmospheric conditions that are linked to El Niño, including sea-surface temperatures in the Pacific and changes in wind and rainfall patterns. While some researchers argue that climate change can increase the likelihood of stronger El Niño conditions by altering baseline ocean and atmospheric states, others emphasize that it is difficult to separate long-term trends from year-to-year fluctuations. The reporting indicates that scientists are using ongoing observations and climate models to assess signals that may suggest an impact from greenhouse-gas warming, but they caution that definitive attribution will require more data from the evolving event and further analysis across multiple studies.