"Trends in the cumulative number of days under extreme heat conditions, Canada, 1948 to 2023",, ,, Trends,Number of stations,Percentage Increase (Statistically significant),128,19% Increase (Not statistically significant),283,42% Increase (Total),411,60% Decrease (Statistically significant),3,<1% Decrease (Not statistically significant),124,18% Decrease (Total),127,19% Insufficient events,143,21% ,, "Note: Percentages may not add up to 100 due to rounding. The analysis does not include stations for which there are less than 30 years of temperature observations. Insufficient events refers to stations that did not experience enough years with extreme heat events to perform a trend analysis. For more information, please refer to the Methods section (www.canada.ca/en/environment-climate-change/services/environmental-indicators/extreme-heat-events.html#methods). The proportion of stations with statistically significant trends is low, but this is expected, given the rarity of extreme heat events, climate trend variability, large year-to-year variability at individual locations, and the limited number and distribution of reporting stations. To see the trends at monitoring stations, refer to Annex A (www.canada.ca/en/environment-climate-change/services/environmental-indicators/extreme-heat-events.html#annex-a).",, Source: Environment and Climate Change Canada (2024) Third generation of homogenized surface air temperature data (www.canada.ca/en/environment-climate-change/services/climate-change/science-research-data/climate-trends-variability/adjusted-homogenized-canadian-data/surface-air-temperature.html).,, Available on the Environmental indicators website (www.canada.ca/environmental-indicators).,,