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May was the world’s second-hottest on record, EU scientists say

By Thomson Reuters Jun 9, 2026 | 9:08 PM

By Kate Abnett

BRUSSELS, June 10 (Reuters) – The world has just experienced the second-hottest May since records began, as climate change ​and the developing El Niño weather ‌pattern conspired to push up average land and sea temperatures, the European Union’s Copernicus Climate Change Service (C3S) said on Wednesday.

• The hottest May on record ‌was ​in 2024, in records going ⁠back to 1940.

• ⁠The average global temperature last month was 1.42 degrees Celsius above the average in 19th-century pre-industrial times.

• Western Europe experienced one ​of the most severe heatwaves ever recorded so early in the year.

• C3S says ⁠the extreme heat in ⁠Europe was in line with scientists’ ​expectations of how climate change will affect the ​world’s fastest-warming continent.

• Parts of the Pacific ‌Ocean recorded exceptionally high temperatures as it transitions towards El Nino conditions.

• Extreme weather last month included fatal floods in China ⁠and Turkey.

• The El Niño weather pattern is expected to form in the coming months and to ⁠fuel extreme ‌weather around the world.

• El ⁠Niño naturally occurs every two to ​seven ‌years, when weakening trade winds result ​in warmer ⁠waters in the eastern Pacific. The result tends to be higher global temperatures, and disrupted rainfall, meaning drought in some regions, heavy rains in others.

(Reporting by Kate Abnett; Editing by ​Kevin Liffey)