Smoke billows over the Boulder County town of Superior on Dec. 30, 2021, during the start of the Marshall Fire. The fire near Boulder, Colorado, killed two people and destroyed more than 1,000 structures to become the most destructive wildfire in Colorado history. The fire was driven by wind gusts of up to 100 mph that pushed the embers through dry vegetation that would normally have been either damp or covered in snow at that time of year.

A home burns in Boulder County on Dec. 30, 2021, during the Marshall Fire near Boulder, Colorado, which killed two people and destroyed more than 1,000 structures to become the most destructive wildfire in Colorado history. The fire was driven by wind gusts of up to 100 mph that pushed the embers through vegetation that would normally have been either damp or covered in snow at that time of year.

A firefighteron Dec. 30, 2021, watches during the Marshall Fire near Boulder, Colorado, which killed two people and destroyed more than 1,000 structures to become the most destructive wildfire in Colorado history. The fire was driven by wind gusts of up to 100 mph that pushed the embers through vegetation that would normally have been either damp or covered in snow at that time of year.

Homes burn in Boulder County on Dec. 30, 2021, during the Marshall Fire near Boulder, Colorado, which killed two people and destroyed more than 1,000 structures to become the most destructive wildfire in Colorado history. The fire was driven by wind gusts of up to 100 mph that pushed the embers through vegetation that would normally have been either damp or covered in snow at that time of year.

A person walks away as homes burn in Boulder County on Dec. 30, 2021, during the Marshall Fire near Boulder, Colorado, which killed two people and destroyed more than 1,000 structures to become the most destructive wildfire in Colorado history. The fire was driven by wind gusts of up to 100 mph that pushed the embers through vegetation that would normally have been either damp or covered in snow at that time of year.

A car burns in Boulder County on Dec. 30, 2021, during the Marshall Fire near Boulder, Colorado, which killed two people and destroyed more than 1,000 structures to become the most destructive wildfire in Colorado history. The fire was driven by wind gusts of up to 100 mph that pushed the embers through vegetation that would normally have been either damp or covered in snow at that time of year.

A hotel burns in Boulder County on Dec. 30, 2021, during the Marshall Fire near Boulder, Colorado, which killed two people and destroyed more than 1,000 structures to become the most destructive wildfire in Colorado history. The fire was driven by wind gusts of up to 100 mph that pushed the embers through vegetation that would normally have been either damp or covered in snow at that time of year.

A person watches homes burn in Boulder County on Dec. 30, 2021, during the Marshall Fire near Boulder, Colorado, which killed two people and destroyed more than 1,000 structures to become the most destructive wildfire in Colorado history. The fire was driven by wind gusts of up to 100 mph that pushed the embers through vegetation that would normally have been either damp or covered in snow at that time of year.

People run past flames in Boulder County on Dec. 30, 2021, during the Marshall Fire near Boulder, Colorado, which killed two people and destroyed more than 1,000 structures to become the most destructive wildfire in Colorado history. The fire was driven by wind gusts of up to 100 mph that pushed the embers through vegetation that would normally have been either damp or covered in snow at that time of year.

Firefighters try to stop structures from burning in Boulder County on Dec. 30, 2021, during the Marshall Fire near Boulder, Colorado, which killed two people and destroyed more than 1,000 structures to become the most destructive wildfire in Colorado history. The fire was driven by wind gusts of up to 100 mph that pushed the embers through vegetation that would normally have been either damp or covered in snow at that time of year.

A person walks past a burning vehicle in Boulder County on Dec. 30, 2021, during the Marshall Fire near Boulder, Colorado, which killed two people and destroyed more than 1,000 structures to become the most destructive wildfire in Colorado history. The fire was driven by wind gusts of up to 100 mph that pushed the embers through vegetation that would normally have been either damp or covered in snow at that time of year.

A burned car sits on the road in Boulder County on Dec. 30, 2021, during the Marshall Fire near Boulder, Colorado, which killed two people and destroyed more than 1,000 structures to become the most destructive wildfire in Colorado history. The fire was driven by wind gusts of up to 100 mph that pushed the embers through vegetation that would normally have been either damp or covered in snow at that time of year.