A fire engulfs a home on 40th Avenue in Clearlake, Calif., early on Sunday, April 10, 2011. Photo by Susanah Carlsen.

CLEARLAKE, Calif. – A Sunday morning fire destroyed a red-tagged residence in Clearlake.

The house, located in the 15000 block of 40^th Avenue, was reported to be on fire at about 2:30 a.m. Sunday, according to a California Highway Patrol incident log.

Lake County Fire officials could not be reached Sunday for additional information.

Susanah Carlsen, who lives across the street from the structure – which she believed was a mobile home with an add-on – said it was “up in flames” by about 2:30 a.m., and she called the fire department. She estimated that the fire likely began around 2 a.m.

Carlsen said nobody lived at the home, which was red-tagged a few weeks ago, although she noted, that there have been people inside and around it during the past few weeks and especially within the last few days.

She said she didn't know if anyone was harmed.

The structure was still standing Sunday, Carlsen said. “It's pretty burnt up, but all the walls appear to still be up.”

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A Lake County Fire Protection fire truck arrives on scene at an early morning structure fire on 40th Avenue in Clearlake, Calif., early on Sunday, April 10, 2011. Photo by Susanah Carlsen.