2025: One of 3 Hottest Years on Record, Human Actions Push Climate Past 1.5°C Limit

• 2025 was one of the three hottest years on record, with human behavior worsening climate change, according to World Weather Attribution scientists.
• The three-year temperature average for the first time exceeded the 1.5 degrees Celsius warming limit set by the 2015 Paris Agreement.
• Continued burning of fossil fuels is cited as the primary cause, leading to dangerous extreme weather events globally, despite a La Niña cooling effect.
• WWA identified 157 severe extreme weather events in 2025, including deadly heat waves, wildfires in Spain/Greece/Turkey, floods in Mexico/India, and Super Typhoon Fung-wong.
• Global climate negotiations in Brazil failed to establish an explicit plan to transition away from fossil fuels, with varying national approaches and political hurdles.

Why It Matters: Human-caused climate change made 2025 record hot, pushing global warming past critical limits.