UN Climate Report: Earth Likely to Breach 1.5°C Threshold Multiple Times by 2030

A new United Nations climate report projects that the Earth will likely exceed the internationally agreed-upon warming limit of 1.5 degrees Celsius (2.7 degrees Fahrenheit) above pre-industrial levels multiple times in the next five years, shattering heat records and intensifying extreme weather events. The World Meteorological Organization (WMO) and the UK Met Office released the forecast, which indicates a 75% chance that average global temperatures between 2026 and 2030 will surpass this critical threshold, a key goal of the 2015 Paris climate agreement.

The report also warns of an overheating Arctic, with temperatures rising nearly 3 degrees Fahrenheit by 2030, and an increased risk of drought and wildfires in the Amazon rainforest, a vital carbon sink.

The projections show a 91% probability that at least one of the next five years will exceed the 1.5°C mark, and an 86% chance that a new hottest year on record will be set, surpassing 2024. Each year from now until 2030 is expected to be between 2.3°F and 3.4°F warmer than the late 1800s.

While exceeding the 1.5°C threshold for a single year does not mean the Paris Agreement has failed—which is measured over a 20-year average—scientists emphasize that every fraction of a degree of warming increases the severity of impacts. “It’s important to note that 1.5 is not a cliff edge we’re going to fall off,” said report co-author Melissa Seabrook of the UK Met Office.

“Every 0.1 of a degree has more and more severe impact.”

The report highlights that a strong El Niño event, a natural climate pattern that warms the central Pacific and raises global temperatures, is expected to form soon and could persist until 2028. This could make 2027 the hottest year on record.

The warming trend appears to be accelerating, with the next five years potentially showing a warming rate of 0.25°C per decade, faster than the previous rate of about 0.2°C per decade. Climate scientists are debating whether global warming is accelerating, and these projections would support that view.

The Arctic is warming 3.5 times faster than the global average due to melting ice and snow, which reduces the reflection of solar radiation. The report projects that Arctic winters from 2026 to 2030 will be 5.1°F warmer than the 1991-2020 average, and summer sea ice will continue to shrink.

In the Amazon basin, the forecast calls for warmer and unusually dry conditions, increasing wildfire risk and potentially turning the region from a carbon sink into a carbon source. The Sahel region of Africa is expected to receive more rain than normal, which could lead to flooding.

United Nations climate chief Simon Stiell stated, “Despite the progress of recent years, it’s clear that global heating is still outpacing global efforts to contain it... Whether it’s extreme heat, mega-storms, floods, massive wildfires or droughts hitting food supply and prices, every nation is already paying a huge price from this global climate crisis.” The report underscores the urgent need for stronger climate action to mitigate the worst impacts of a warming world.