A combination of intense heat and drought conditions is causing wildfires in Western Canada to generate their own weather systems, experts say. "It was probably the single largest pyrocumulonimbus storm of the year so far,'' he added. Damaged buildings are seen in Lytton, B.C., on July 9, after a wildfire destroyed most of the village on June 30. "When you get all those three things together, you get the perfect triple that we call fire weather,'' Fromm said. How firestorms beginFromm said a pyrocumulonimbus storm usually begins with a smouldering fire, which feeds on the surrounding air turning active and creating a thermal bubble.

Source: CBC News July 27, 2021 14:27 UTC