The Latest on wildfires burning in California (all times local):

6:55 a.m.

Fire crews gained some significant ground on a massive Northern California wildfire that has destroyed 175 homes, businesses and other structures and charred nearly 7 square miles.

California Department of Forestry and Fire Protection spokesman Daniel Berlant says the fire in Lower Lake, about a two hour drive from San Francisco, was 20 percent Monday.

The progress came as authorities arrested 40-year-old Damin Anthony Pashilk of Clearlake, California, on 17 counts of arson Monday. Pashilk is suspected of sparking the blaze that exploded over the weekend. Officials say he is also suspected in several other fires over the past year in Lake County.

Roughly 1,600 firefighters are battling the blaze Tuesday through warm temperatures and light winds.