A construction site, near 18th Avenue and Emerson Street in downtown Denver, went up in flames Wednesday afternoon.

Here's a breakdown of what we know, by the numbers:

12:09 p.m. – The start of the fire.

STORY: Fire erupts at construction site; one dead.

1 person has been found dead inside of the building, according to Denver Fire.

1 person, a construction worker, was critically injured.

1 person is unaccounted for, which is down from two; investigators aren't sure if the missing person was hurt, or if they walked away from the scene.

According to witnesses, people were seen jumping from the second and third floors, according to Denver Fire spokesperson Greg Pixley.

This was a 3-alarm fire.

Initial reports from construction workers say it started on the third floor. The fire department cannot know this for sure until the investigation is complete.

About four people needed to be treated for smoke inhalation.

Sky9 over construction site fire.
Sky9 over construction site fire.

This is supposed to be a five-story apartment building that was due to be finished in summer.

STORY: Construction site destroyed by fire was slated as 5-story, 85-unit apartment building

Six people were hurt. One of them is a firefighter with minor injuries.

Six buildings were affected. The building where the fire started is a total loss. Some of the others were damaged on the roofs by embers.

Courtesy Denver Police Department

30 to 40 personal cars were affected; melted, etc. Three construction vehicles and three fire engines were also damaged.

STORY: Photos show melted cars in wake of massive Denver fire

About 50 construction workers were there at the time of the fire.

About 100 firefighters responded.

Police have taken more than 100 statements from witnesses.

Smoke stretched about 200 feet in the air.

STORY: Smoke from massive construction fire in Denver visible on NWS radar

The heat could be felt about 400 feet away, Pixley said. To put that in perspective, a football field's about 360 ft. long.

Football field (Thinkstock)
Football field (Thinkstock)

1800 – The entire block of Emerson that’s under an evacuation order.

STORY: Evacuation center opens for people displaced by massive Denver fire

Number you should call with any information about this fire: 720-337-2800.

And, while we don't know the actual distance, we know people could see this fire from far away.

This person spotted it on a plane.

Viewer Rob Fairbank saw the massive plume of smoke from the construction fire in North Capitol Hill today while he was flying into DIA.
Viewer Rob Fairbank saw the massive plume of smoke from the construction fire in North Capitol Hill today while he was flying into DIA.

And the National Weather Service said it could be seen from space.

STORY: Smoke from massive construction fire in Denver visible on NWS radar