This is what a fire shelter looks like.
It is what the fire fighters killed in Arizona were using to try to shield themselves from the heat.
Sarah Tunge with the North Dakota Forest Service says all fire crews responding to wildfires are required to carry the fire shelters - even in North Dakota.
Crews are trained on how to use them as a last resort in desperate situations.
When deployed, the shelter looks like a tent, it is meant to protect firefighters from the heat but is not fire retardant.
"Basically it reflects radiant heat away from a fire fighter who is trapped in a situation he can't get out of and provides protection for your airway. People have deployed in situations where it is the last resort, they couldn't get to a safety zone. So they have deployed fire shelters and walked away from that situation. So they do work," says Tunge.
Tunge says local and rural fire departments in North Dakota also have fire shelters as part of their fire gear or on hand in engines.