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
That is true but you have a lot more resources coming to a fire then showing up before a hurricane. I am not saying you have two lanes worth, but with the possibility of smoke obscuring visibility. The emergency vehicles are often given little more room. Also they often have to run with emergency lights at all times. So that is what you are expecting to see. Not someone in a little gray Honda.
I don’t know if that is what is happening here, but it is a reasonable possibility.