A highway camera photo shows traffic in FortMcMurray jammed in the southbound lane of Highway 63 on the north side of the Athabasca River. The image was captured at 3:11 p.m. MT, about an hour after an evacuation order was issued for four neighbourhoods. (511 Alberta)
Evacuation order issued as wildfire threatening Fort McMurray draws closer https://www.cbc.ca/news/canada/edmonton/alberta-wildfire-grande-prairie-fort-mcmurray-1.7203695
“Pretty quickly” is still like 5mph maybe during peak evacuation traffic from a major hurricane. Smaller hurricanes aren’t a problem because so many people choose to stay after horrible experiences trying to evacuate before: safer to stay home than be stranded on i10.