The extreme temperatures experienced were far outside the range of past observed temperatures, making it difficult to quantify exactly how rare the event is in the current climate and would have been without human-caused climate change - but the researchers concluded that it would have been “virtually impossible” without human influence. To quantify the effect of climate change on these high temperatures, the rapid attribution study analysed the observations and computer simulations to compare the climate as it is today, after about 1.2☌ (2.2☏) of global warming since the late 1800s, with the climate of the past, following peer-reviewed methods. North America had its warmest June on record, according to the monthly bulletin from Copernicus Climate Change Service implemented by the European Centre for Medium-Range Weather Forecasts (ECMWF).Įvery heatwave occurring today is made more likely and more intense by climate change. Shortly after setting the record, Lytton was largely destroyed in a wildfire. Pacific Northwest areas of the US and Canada saw temperatures that broke records by several degrees, including a new all-time Canadian temperature record of 49.6☌ (121.3☏) in the village of Lytton - well above the previous national record of 45☌ (113☏). ![]() Climate change, caused by greenhouse gas emissions, made the heatwave at least 150 times more likely to happen. The record-breaking heatwave in parts of the US and Canada at the end of June would have been virtually impossible without the influence of human-caused climate change, according to a rapid attribution analysis by an international team of leading climate scientists.
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