They've been happening more and more lately. One last year was causal to a 30 car pileup with 2 killed and 20+ serious injuries. I was passing through right at that moment headed to PHX from a contract, and was going 5mph through the dust when I came upon carnage and wreckage. Stuck there as only fire vehicle and firefighter for 30 minutes until first additional fire units could arrive. Accident scene was 1/3 mile long. Was a pain triaging that.
Couldn't land helicopters due to the blowing dust, all transports had to be from ground. Luckily, no vehicles caught fire.
In the vid below, at :15, my firetruck is in the foreground in front of the black car, and at :27, you see the car that had the initial fatal, as well as the woman who later became a fatal. This extrication was being done by the north-sector extrication team, and you can see me in the yellow turnout coat going under the back end of the tractor-trailer, as that was where the surviving woman was trapped in the mangled wreckage and it was the only place I could reach into the wreckage and communicate with her.