Devastating wildfires fuelled by raging winds have ripped through towns destroying up to 1,000 homes.
Communities in the Boulder County area of Colorado have been evacuated after downed power lines sparked a number of blazes.
Emergency services are reportedly battling seven huge wildfires in the area.
The town of Superior was been evacuated while some neighbourhoods in Louisville have also followed suit - seeing around 30,000 forced to flee their homes.
Officials estimate at least 1,000 homes have already been lost - with one devastating aerial image showing a whole community of homes razed to the ground.
All patients and staff in the 114-bed facility of Avista Adventist Hospital have also been fully evacuated after a wildfire started nearby.
9 News journalist Kyle Clark tweeted horrific scenes of a home being burned entirely to the ground within 20 minutes.
The National Weather Service out of Denver/Boulder said the blazes created a life-threatening situation and prepared people to evacuate.
Colorado governor Jared Polis said it was a miracle no deaths or missing persons had been reported.
He said: "We might have our very own New Year’s miracle on our hands, if it holds up that there was no loss of life.
"This was consuming football-field lengths of land in seconds.
“We had never seen anything like it. This was a horrific event.”
Boulder County Sheriff Joe Pelle said: "It’s unbelievable, when you look at the devastation, that we don’t have a list of a hundred missing persons.
"I'’m hoping that’s a miracle."
Resident Mark Smith tweeted how he had yesterday received news that his family had lost all their possessions.
He said: "Just got word that every material possession we had today is now gone. Our home, cars, and everything we had in our home lost to the fires that ripped through our community.
"Thank you to those who reached out. Processing how to completely start over and grateful for our health."
Daniel Swain, a meteorologist at the University of California, tweeted that it was “genuinely hard to believe” these fires were happening in December, which is usually a quieter time for blazes.
“But take a record warm & dry fall, only 1 inch of snow so far this season, & add an extreme (100mph ) downslope windstorm...and extremely fast moving/dangerous fires are the result.”
