Canada’s 2025 Heat Waves: Climate Change Reality Check
Environment and Climate Change Canada (ECCC) has linked several extreme heat waves in 2025 to human-caused climate change, similar to findings from the prior year. This connection was established using a new rapid extreme weather event attribution system that compares current climate data to pre-industrial conditions. The system analyzes recorded greenhouse gas levels and human activities to determine the impact of climate change on the likelihood of extreme weather events. In reviewing 10 of the hottest heat waves from July and August, the system concluded that nine were made “much more likely” due to climate change.
John Q. Hosedrinker