COLUSA COUNTY (CBS13) — Firefighters say better mapping has given them a better idea for the size of wildfire that is prompting evacuation orders in rural Colusa County.

As of Monday evening, Cal Fire reports that the Sites Fire is at 540 acres and 55 percent containment.

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This is down from the original 1,000-acre estimate from Sunday when the fire was first reported.

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Evacuation orders have been updated to advisories for the 3300 block of Sites Lodoga Road/Campground Road in Colusa County Monday evening.

About 12 structures are threatened by the wildfire, officials said.

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The fire is located off of Sites Lodoga Road and Campground Road, Southeast of Stonyford, Cal Fire said.