Global Warming Reaches Record Levels as Key Climate Indicators Continue to Worsen, Scientists Warn

Global temperatures are rising at record rates, and critical climate indicators are continuing to deteriorate, according to a new assessment released on Thursday by leading climate scientists. Researchers also warned that funding cuts to Earth-observation systems in the United States and other countries could undermine efforts to monitor and respond to climate change.

More than 70 scientists from around the world, including members of the United Nations’ Intergovernmental Panel on Climate Change (IPCC), contributed to the annual study. The researchers expressed concern over record levels of human-induced warming and the increasing frequency and intensity of marine heatwaves.

The study’s co-author, Professor Peter Thorne of Ireland’s Maynooth University, compared the climate indicators to the vital signs of a critically ill patient whose condition is steadily worsening. Thorne, who also serves as Deputy Chair of the UN-backed Global Climate Observing System (GCOS), said he had never before witnessed global climate-monitoring systems being intentionally weakened or placed at such risk.

Published in the journal Earth System Science Data, the study found that global temperatures in 2025 were approximately 1.39 degrees Celsius above pre-industrial levels. Of that increase, an estimated 1.37 degrees Celsius was attributed directly to human activities, including the burning of fossil fuels and land-use changes.

Scientists warned that human-caused warming is on track to reach the critical threshold of 1.5 degrees Celsius by 2030 if current trends continue. Crossing that benchmark would significantly increase the risks of severe climate impacts, including more frequent heatwaves, droughts, flooding, and ecosystem disruption.

The report also highlighted the rapid accumulation of heat within the Earth system, indicating that the planet is storing energy at an unprecedented rate. This growing “Earth energy imbalance” is contributing to rising temperatures in the atmosphere, oceans, and land surfaces, further accelerating climate change.

Researchers stressed that maintaining robust global observation networks is essential for tracking these changes, improving climate forecasts, and supporting policy decisions aimed at limiting future warming.

The findings add to growing scientific concern that the world is moving closer to key climate thresholds, underscoring the urgency of reducing greenhouse gas emissions and strengthening international climate action.