April Ranks Third-Warmest as Strong El Niño Risk Grows

Global temperatures remained exceptionally high through April and May 2026, while ocean heat, low sea-ice extent, and widespread marine heatwaves pointed to a developing El Niño.

Climate agencies expect El Niño conditions to emerge or strengthen later in the year, which could add temporary warming and shift the likelihood of drought, heavy rainfall, wildfires, coral bleaching, and fisheries impacts across different regions. The timing and peak strength of the event remain uncertain.