2025 is the second hottest year since records began

The EU’s Copernicus Climate Change Service reports 2025 is on track to be the second-warmest year on record, with a mean temperature 1.48°C above preindustrial levels (behind 2024’s 1.6°C); that rise is occurring despite a shift to La Niña because fossil-fuel emissions hit a new record in 2025, keeping upward pressure on temperatures. The warmer climate is already driving acute losses: European heatwaves this summer caused an estimated 16,500 excess deaths, Hurricane Melissa—the strongest hurricane to hit Jamaica—killed more than 80 people and caused roughly $8.8 billion in damages (with rainfall and wind intensity amplified by 16% and 7% respectively), and a string of late-year cyclones in South and Southeast Asia killed over 1,600; Arctic and Antarctic sea ice are also anomalously low. Copernicus warns the three-year temperature average is set to exceed 1.5°C and scientists expect the long-term average to pass 1.5°C by 2029, effectively undermining the Paris goal and raising the likelihood of crossing ecological tipping points (notably coral reef die-off and risks to the Amazon and major ice sheets), with clear implications for escalating physical, economic and insurance-sector risks.

Analysis

The EU Copernicus Climate Change Service reports 2025 is on track to be the second-warmest year with a mean global temperature 1.48°C above preindustrial levels, behind 2024's 1.6°C, and this elevated baseline persists despite a shift from El Niño to La Niña because fossil-fuel emissions reached a new record in 2025. Observed impacts this year include an estimated 16,500 excess deaths from European heatwaves, Hurricane Melissa — the strongest to hit Jamaica — causing over 80 fatalities and roughly $8.8 billion in damages (with rainfall and wind intensified by 16% and 7% respectively), and more than 1,600 deaths from late-year cyclones across South and Southeast Asia. Arctic and Antarctic sea ice are anomalously low and Copernicus warns the three-year temperature average is set to exceed 1.5°C, while scientists project the long-term average will pass 1.5°C by 2029, undermining the Paris target and increasing the likelihood of crossing ecological tipping points such as irreversible coral reef die-off and elevated risks to the Amazon and major ice sheets. These developments imply materially higher frequency and severity of physical losses, rising economic and insurance-sector exposure, and an elevated probability of nonlinear, systemic shocks that can affect sovereign, corporate and supply-chain creditworthiness.

Key Decisions for Investors

• Stress-test portfolios against accelerating physical-risk scenarios (three-year mean >1.5°C and higher extreme-event frequency) and increase capital buffers for potential catastrophe losses
• Reduce concentrated exposure to insurers, property-heavy corporates and sovereigns lacking robust adaptation plans and consider hedging via reinsurance or insurance-linked securities to transfer acute catastrophe risk
• Reweight toward climate-resilient infrastructure, water and flood-control assets, and companies with verifiable emissions reductions and adaptation investments, while underweighting assets with high uninsured physical exposure
• Actively monitor near-term climate indicators (three-year temperature averages, extreme-event losses, sea-ice extents) and regulatory or litigation developments tied to breached Paris targets as triggers for portfolio adjustments