Echoes of deadly Arizona wildfire with 3 firefighters killed in Colorado-Utah blaze

The firefighters died 30 miles (48 kilometers) southwest of Prescott, Arizona, after trying to escape flames fanned by shifting winds. They were deploying fire shelters — small, heat-resistant tents that can offer a chance at survival — when flames reached them in a brushy box canyon.

Temperatures reached 2,000 degrees (1,100 Celsius).

On Saturday, a wildfire west of Grand Junction, Colorado, killed three firefighters and injured two others. That fire has burned 44 square miles (114 square kilometers). The five firefighters were members of a Helitack crew who are dropped by helicopter into remote areas to saw and dig away vegetation and create fire-resistant barriers ahead of advancing flames.

As at the Yarnell Hill Fire, the firefighters decided to stop fleeing and use fire shelters to try to survive.

A complete investigation could take several months. Full knowledge of what happened could be elusive.

Investigators of the Yarnell Hill Fire could not verify radio communications from the firefighters for a half-hour period that may have shed light on their decision-making process.

The final investigation report ultimately did not fault the firefighters, saying they were fully qualified, staffed and trained and “followed all standards and guidelines.” Their commanders likewise made reasonable judgments and decisions in rapidly worsening conditions, according to the report.

“Complexity can outpace organizational attempts to respond,” the report concluded.

Fire shelters are a last resort, offering roll-of-the-dice odds under otherwise impossible circumstances. In a 2015 wildfire in Washington state, two firefighters who used such tents survived, while three who were in a truck died.

How much the protection the tents provide depends on the conditions in which they are deployed. They are not designed to withstand direct flame, Riva Duncan, president of Grassroots Wildland Firefighters, a firefighter advocacy group, said Monday.

“It’s your last-ditch effort to try to survive,” Duncan said.