UPDATE: Sunday 1:40 p.m.

KCFD says fire is 90% contained and burned a third of an acre.

One home and an out building have been destroyed.

KCFD says high winds were blowing embers and a down power line caused fire to threaten at least 100 homes but crews made significant process to stop the fire before it spread. 

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The Kern County Fire Department, the U.S. Forest Service and the Bureau of Land Management are battling a grass fire that broke out on Sierra Vista Drive and Heim Lane Sunday morning.

A U.S. Forest Service representative told 23ABC a structure is threatened by the one acre fire and that fire crews had a hard time accessing the point of fire because of down power lines.

The representative said the crews have since been able to reach the fire and have stopped the forward progress of the fire.

There is currently one helicopter and two tankers performing drops in the area. 

The cause of the fire is still under investigation. Light smoke remains in the area. 

We will continue to update you as we learn more.