1997–98 El Niño
One of the strongest El Niños ever recorded brought floods to California and Peru, drought and fires to Indonesia, and a record run of Pacific super typhoons. Pacific waters ran more than 2°C above average for months.
Floods, fires, and storms killed thousands and caused tens of billions of dollars in damage worldwide.
It became the benchmark scientists use to define a very strong event and reshaped how agencies forecast and prepare for ENSO.
NOAA's 2026 forecast points to an event that could rival 1997-98 in raw ocean warmth, the closest modern yardstick.
