Canadian wildfires in recent years, including 2023 and 2024, have shown a pattern of burning for several months, sometimes extending from early summer into autumn and even winter smoldering. The 2023 wildfire season, for example, lasted months in remote areas and some fires smoldered into early 2024 before reigniting. The 2025 season has already seen sustained severe wildfire activity since mid-May, with a high number of fires continuously burning, and states of emergency lasting for extended periods in some provinces. The exact duration for which wildfires will last in Canada depends heavily on prevailing weather conditions such as temperature, precipitation, and wind, as well as firefighting efforts. Forecasts for 2025 indicate elevated fire risk continuing well into August and possibly beyond, especially for western Canada. Wildfire smoke and fires themselves may persist intermittently through the late summer and possibly into early fall or later in some regions. In summary, Canadian wildfire seasons in recent severe years have typically lasted at least several months from early summer to autumn, with some fires smoldering longer. In 2025, the wildfire season started early and is expected to continue with high fire activity at least through August, with risks extending into fall. The smoke and wildfire impacts may also persist intermittently through late summer and beyond depending on weather changes.