Pyrocumulus towers from B.C. wildfires loom 200 km away as Fraser Canyon blaze intensifies

FRASER CANYON, B.C. — Towering pyrocumulus clouds have formed over wildfires burning in British Columbia’s Fraser Canyon, creating dramatic skies and dangerous conditions as flames intensify in the region’s steep terrain.

Canadian meteorologists say the towering pyrocumulus clouds are so intense they can be seen more than 200 kilometres (about 125 miles) away, rising like volcanic plumes above the Fraser Canyon fires. The formations, visible from Vancouver and even parts of southern Alberta, mark the extreme heat and vertical convection driving the region’s wildfire behavior — a rare sight that underscores how powerful and self‑sustaining these fire‑generated systems have become.

According to CBC News, the massive smoke‑fed clouds — sometimes called “fire‑generated thunderstorms” — are developing as extreme heat and dry winds drive rapid fire growth. These clouds can produce lightning, strong downdrafts, and erratic winds, complicating firefighting efforts and spreading embers over long distances.

Environment Canada meteorologists warn that pyrocumulus formations can evolve into pyrocumulonimbus systems, capable of generating their own weather and even fire tornadoes. The phenomenon has been observed repeatedly this summer as B.C. faces one of its most volatile wildfire seasons in years.

Emergency crews continue to battle multiple fires across the canyon, with evacuation alerts in place for several communities.

Photo Credit:

Pyrocumulus clouds, seen from Coquitlam, B.C., are pictured forming above the Boston Bar wildfire on July 21. (Submitted to the CBC.ca by @Brad604/X) 

Further Reading:

https://globalnews.ca/news/11978141/pyrocumulus-clouds-fraser-canyon/?

https://www.cbc.ca/news/canada/british-columbia/pyrocumulus-clouds-wildfire-fraser-canyon-9.7281671

https://satlib.cira.colostate.edu/phenomena/pyrocumulus/?