They were highly skilled and trained to battle raging wild fires, but the flames proved too much for 19 elite US firefighters who were all killed doing their job.
It is the biggest loss of life among firefighters since the 9/11 terror attacks.
The wildfires started near the town of Yarnell, 80 miles northwest of Arizona'a capital Phoenix.
ITV News Washington Correspondent Robert Moore reports:
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A rollercoaster has reportedly come off the rails at a theme park in Scotland.
"I saw a lot of smoke come out from the tail-end of the aircraft. I wondered if it was normal, whether it was just exhaust fumes."
The House of Commons Petitions Committee has said they will keep an eye on the petition and are concerned about fraudulent signatures.