Firefighters on both sides of the Carquinez Strait spent Saturday morning knocking down house fires, one in Martinez before dawn and another in Vallejo a few hours later.

Martinez: heavy fire in the attic

The first call came in the early hours from the 5400 block of Alhambra Valley Road in Martinez. According to News24-680, neighbors reported a tree burning behind a home at 5460 Alhambra Valley Road. When crews pulled up at 4:03 a.m., they found heavy fire in the attic and roof of the single-story house.

Firefighters searched the home for residents and quickly called a second alarm as flames moved along the roofline. Part of the roof collapsed, and crews also had to work around the house's large rooftop solar system, which can stay electrically live during a fire.

Contra Costa County Fire said water tenders were brought in to supply water at the semi-rural site, and the fire was out by 5:29 a.m. Searches came back clear and no injuries were reported, according to Bay City News. One commenter on the News24-680 report described conditions overnight as windy. The cause and the cost of the damage had not been released as of Saturday.

Vallejo: two-story home near Henry Ranch Park

About five hours later, Vallejo firefighters were sent to the 400 block of Newport Way at around 10:30 a.m. for a fire in a single-family home. Bay City News reported that the house is a two-story, four-bedroom home near Henry Ranch Park, based on real estate listings.

Crews had the fire under control by about 11:45 a.m., after more than an hour of work. Newport Way was closed in both directions while firefighters stayed on scene for cleanup and overhaul, the slow job of pulling apart walls and ceilings to make sure no hidden embers flare back up. The Vallejo Fire Department did not immediately share a cause or say whether anyone was hurt.

A busy fire safety weekend

The fires came on the same day Contra Costa County Fire held its yearly open house at its Concord headquarters on Treat Boulevard, which this year focused on safe charging of rechargeable batteries. With dry, breezy fall weather in the forecast and a wet El Niño winter ahead, fire officials have been urging residents to check smoke alarms and keep yards around homes cleared.