UPDATE AT 5 P.M.: The fire is still burning and several businesses lost everything in this morning's fire.
It could have been much worse though because there were 3 firefighters in the building when the roof collapsed. 3 firefighters are now recovering from minor injuries.
Leslie Coronado, who saw the fire, tells 13 Action News that it appeared to be really out of control.
Initially, fire crews didn't see any flames, they only saw smoke. Then, the fire blew through the roof and it began to collapse.
Clark County Fire says there also should have been fire alarms active yet they got no calls from any monitoring company saying their was any problem at this address and receives reports of the fire from eye witnesses.
A check of the Clark County Assessor records shows the building was built in 1986.
The building was under construction in the years following the MGM Grand fire in 1980, that killed 85 people.
That fire resulted in fire codes being changed across Nevada, including Las Vegas.
13 Action News is working to find out the building and fire codes for the buildings at the address of the fire.
UPDATE 11 A.M.: Firefighters are still on the scene of a large fire in an office building on Monday morning. The fire department says that they will be on scene for several more hours and that smoke will continue to be an issue in the area.
Roads in the area were reopened shortly before 11 a.m. Clark County Fire Chief Greg Cassell told 13 Action News that it was a difficult and dangerous fire because the first started in the attic and caused the roof of the building and walls to collapse, creating pockets of flames. Cassell also said that there were no fire sprinklers in the building.
Crews had to knock out windows to gain access to the pockets and poured thousands of gallons of water on the fire from above.
The 2nd floor of the office complex is a complete lost. We're still waiting to find out if anything can be saved.
UPDATE 10 A.M.: A massive fire that burned for hours this morning and continues to cause road closures near near Flamingo and Paradise was likely started in the shared attic of an office building where there are no smoke alarms, authorities say.
RIGHT NOW: Clark County Fire Chief is giving an update on massive fire at Flamingo.— @SeanKTNV (@seanktnv) June 17, 2019
Says crews moved in to find fire when it fell out of the attic, into the area fire crews were working.
They had to retreat. pic.twitter.com/JTsDMWwUSl
WATCH FULL DEPARTMENT UPDATE:
LAS VEGAS (KTNV)-- Clark County firefighters are on the scene of a large fire at an office building near Flamingo and Paradise roads.
There are road closures in the area as crew continue to battle the fire.
Southbound Paradise is closed between Twain and Flamingo and northbound Paradise is being diverted to westbound Corporate Drive.
The damage is extensive and parts of the roof and some walls have collapsed.
Parts of the roof, walls, have given way pic.twitter.com/6D1YP6Uly5— Kelsey McFarland (@KelseyMarie_TV) June 17, 2019
Authorities say no one was in the building at the time.
Initial reports of the fire came through around 3 a.m. but the scene remains active.
Avoid the area if you can.
WATCH FIRE DEPARTMENT UPDATE: