No pathway stays under 1.5C
A report from the United Nations Environment Programme says there are no plausible scientific pathways left that keep global warming below 1.5 degrees Celsius. The study, titled Limiting Overshoot, concludes that the Paris Agreement limit will be breached within the next few years. In the most optimistic scenario, peak warming reaches about 1.8 degrees before temperatures fall back. Record heat waves, deadly flooding and other extreme weather in 2026 reflect a planet that is already warmer than the baseline governments used when they set the target.
Every fraction of a degree
UNEP chief Inger Andersen said every fraction of a degree will cost lives. The report states that even a temporary exceedance of 1.5C will leave irreversible losses, including coral reef die-off, glacier retreat and damage to communities that cannot move. Its central argument is that the goal now is to limit how high temperatures go and how long they stay there, then bring them back down. That shift changes the policy agenda from avoiding overshoot to managing it, which puts more weight on carbon removal, land restoration and adaptation spending.
Pressure builds in New York
The findings arrive as Climate Week NYC runs from September 20 to 27, with governments, investors and companies meeting in New York to discuss emissions cuts and finance for adaptation. The week follows a period in which the United States moved to lift limits on greenhouse gas emissions from power plants, a step that state regulators may not replace. In Asia, Nepal's government said it will seek reparations from major economies for damage tied to collapsing Himalayan glaciers, and researchers in Europe warned that drying rivers are threatening industry and power generation. Negotiators preparing for the next climate summit face a familiar gap between pledges and delivered cuts.
The report also calls for faster cuts to methane, which can slow warming more quickly than cuts to carbon dioxide alone.