The sun rises over New York City as a heat wave arrives in June 2025.

The past three years have been the world’s hottest on record by far, with 2025 almost tied with 2023 for second place. With that energy came extreme weather, from flash flooding to powerful hurricanes and severe droughts. Yet, by most indicators, the planet should have been cooler in 2025 than it was.

So, what happened, and what does that say about the year ahead?

Originally published on theconversation.com, part of the BLOX Digital Content Exchange.

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