Seen a similar situation in Montana 2 summers ago when The mussleshell flooded. The only way to town was a "dirt road" that went the long way around to get to town. It was so muddy that once you got on it you couldn't stop or you would get stuck even with 4 wheel drive. Dozens of vehicles buried in the mud. I drive my wifes 2 wheel drive suv along side the road in the sage brush for MILES and 6 hours later, made it to town. That was a baaaaad day. Looks like these folks are in the same boat but colder