UN urges action to limit the impact of crossing the 1.5°C climate threshold

Monday 07 September 2026 - 11:32

By: Azzat Manal

UN urges action to limit the impact of crossing the 1.5°C climate threshold

The United Nations has issued a renewed warning over the accelerating pace of global warming, urging governments to focus on limiting the scale and duration of any breach of the critical 1.5°C temperature threshold above pre-industrial levels.

According to the latest assessment from the United Nations Environment Programme (UNEP), the world is on a trajectory that makes a temporary breach of the 1.5°C target increasingly difficult to avoid in the coming years. The development represents a major challenge to the climate commitments made under the Paris Agreement, which seeks to keep global warming well below 2°C while pursuing efforts to limit it to 1.5°C.

The warning comes as countries around the world continue to experience increasingly severe climate-related events, including prolonged heatwaves, destructive wildfires and devastating floods. Scientists have linked the growing frequency and intensity of many extreme weather events to human-driven climate change.

UN Secretary-General António Guterres has described the fight against climate change as a critical challenge for humanity, warning that every additional fraction of a degree of warming could bring serious and potentially irreversible human and economic consequences.

Rising temperatures are putting pressure on ecosystems, food production and freshwater resources while increasing the risks facing coastal communities exposed to rising sea levels. Vulnerable populations are expected to face some of the most severe consequences despite often contributing the least to global greenhouse gas emissions.

The UN, however, says that crossing the 1.5°C threshold temporarily should not be interpreted as the end of international climate efforts. Instead, it argues that governments must act quickly to minimize both the extent and duration of any overshoot.

UN experts maintain that bringing global temperatures back below 1.5°C by the end of the century could remain technically possible, but only if emissions are reduced sharply and immediately. This would require a faster transition away from fossil fuels, greater investment in clean energy and stronger protection of forests and other natural carbon sinks.

The organization has also called on governments to strengthen their national net-zero strategies, arguing that current commitments remain insufficient to put the world on a safer climate trajectory. Developed countries are being urged to significantly increase financial support for climate adaptation in communities most exposed to the effects of global warming.

The UN's message also highlights the issue of historical responsibility, with industrialized economies having contributed a large share of cumulative greenhouse gas emissions. At the same time, the organization stresses that technological and economic solutions already exist to accelerate the transition toward a lower-carbon global economy.

The coming years will therefore be crucial. While temporarily exceeding 1.5°C would represent a serious setback, the UN maintains that the scale of future warming will depend largely on decisions made today, making rapid emissions cuts and international cooperation central to limiting the damage caused by climate change.