Multiple wildfires in Jasper National Park flared up with a vengeance late Monday night, forcing all park visitors along with the 4,700 residents of the Jasper townsite to flee west with little notice over mountain roads through darkness, soot, and ash.

Photos and video shared on social media illuminated a midnight cavalcade of bumper-to-bumper cars and trucks, headlights on, red tail lights glowing, cars inching, stopping, starting, crawling through swirling tendrils of acrid smoke.