Hazmat crews were called out late last night to a hydrogen tanker fire in Colorado Springs.
It happened around 10 p.m. on the 1100 block of Cheyenne Mountain Blvd.
Crews quickly evacuated the workers at the Atmel building and established a safe zone.
Hydrogen burns at extreme temperatures so crews had to use liquid nitrogen instead of water.
Lt. James Eddy with the Colorado Springs Fire Department says"
The temperature at which it burns is 2,500 degrees, so it burns extremely hot, and so that is one reason why we have a hard time seeing it and getting it to disperse... its very difficult to see with the naked eye. "
Authorities say the biggest danger was the chance of explosion.
There were no immediate health threats.
The fire was finally contained around 1:30 this morning.
No injuries were reported and no other evacuations were reported.