Understanding El Niño
El Niño is part of the El Niño–Southern Oscillation (ENSO), a natural pattern involving changes in tropical Pacific ocean temperature and atmospheric circulation. Those changes can shift rainfall and temperature patterns beyond the Pacific, but they do not make the same weather happen everywhere. Prof Mat Collins’s Guardian interview (26 September 2026) is this wiki’s first reviewed introduction.
Three kinds of statement
Section titled “Three kinds of statement”| Statement | What it means | What it does not tell you |
|---|---|---|
| Observation | A measured condition at a specified place and date. | That a particular community will have a disaster. |
| Forecast | A dated, uncertain assessment of what may happen over a stated period. | A guarantee, or a permanent assessment. |
| Local implication | An interpretation of how a forecast may affect a specific place. | A conclusion you can make from a global headline alone. |
Human-caused warming and ENSO are distinct. They can compound heat and other risks, but a single extreme event should not be attributed to El Niño just because it happens during an El Niño year. Collins cautions against attributing recent heat and fires to the developing 2026 event in the interview.
Before you act on a headline
Section titled “Before you act on a headline”Check the date, the geographic area and the kind of evidence. Is a temperature figure a measured ocean anomaly or a projected future value? Does a regional forecast apply to your place? Ask a qualified local meteorological or adaptation source for the most recent outlook; older articles remain useful context but are not the current forecast.