The so-called Trailhead Fire that began in the American River Canyon in Placer County on Tuesday has now grown to at least 350 acres, with about 400 structures threatened. All but about 70 acres is burning in the El Dorado National Forest. Hundreds of residents are under mandatory or voluntary evacuation orders, including Foresthill and Todd Valley. It’s only 5-percent contained, with full containment not predicted before Friday. But CAL FIRE Chief John Hotchkiss is optimistic that the blaze won’t grow too much more…

click to listen to John Hotchkiss

Hotchkiss says it’s not known how the fire started, including whether anyone set it accidentally or on purpose…

click to listen to John Hotchkiss

Hotchkiss says an agressive air attack, with fire retardant, continues, with more than 250 firefighters on the scene.