The United Nations' World Meteorological Organization (WMO) and the UK's Meteorological Office project that the Earth will likely surpass the 1.5°C global warming threshold within the next five years, with a 75% chance that the 2026–2030 average exceeds this critical limit set by the Paris Agreement. While the 1.5°C mark is not a sudden cliff edge, scientists emphasize that each additional 0.1°C brings increasingly severe impacts, including extreme heat, floods, and ecosystem collapse. The 2024 record for the hottest year is expected to be broken, possibly as early as 2027, driven in part by a strong El Niño event that may last into 2028.

The Arctic is warming at 3.5 times the global average due to reduced ice and snow reflectivity, creating a dangerous feedback loop. Winters there are projected to be 5.1°F (2.8°C) warmer than recent averages by 2030. Meanwhile, the Amazon basin faces hotter, drier conditions that could increase wildfire risk and potentially turn the rainforest from a carbon sink into a carbon source, worsening climate change.

UN officials warn that global efforts to reduce emissions are still falling short. The continued burning of fossil fuels is driving extreme weather worldwide, with rising human and economic costs. Scientists are now debating whether global warming is accelerating, as the planet could warm by 0.25°C in just a decade—faster than previous rates. The projections are based on over 200 simulations from 13 climate models, underscoring the urgency of stronger climate action.