Firefighters responded to a major residential fire in Castro Valley, California, on Saturday afternoon after flames engulfed a home on Queen Street, prompting a large emergency response and raising concerns about nearby properties.
According to authorities, the fire was reported shortly before 4:15 p.m. Emergency crews quickly arrived at the scene and found a well-involved structure fire that posed an immediate threat to surrounding homes. Due to the intensity of the blaze and the potential for it to spread, officials upgraded the incident to a three-alarm fire, bringing in additional firefighters and resources to assist with suppression efforts.
Firefighters worked aggressively to contain the flames and protect neighboring residences as smoke billowed over the area. Residents and motorists were advised to avoid the vicinity while emergency personnel carried out firefighting operations and managed traffic around the scene.
According to NBC Bay Area, the fire remained active as crews continued working to prevent the blaze from extending to adjacent structures. Authorities have not yet released information regarding the cause of the fire or whether any injuries have been reported. An investigation is expected to begin once the fire has been brought under control and the area is deemed safe for investigators to enter.
Witnesses in the area shared images and observations on social media as the incident unfolded. One Facebook user posted several photos appearing to show the fire and advised others to avoid Grove Way, noting that heavy smoke was visible and that the air carried what they described as the smell of fireworks. Officials have not confirmed whether fireworks played any role in the fire.
The incident remains under active response, and authorities continue to monitor conditions while firefighters work to fully contain the blaze. Residents are encouraged to follow official updates from local fire agencies and avoid the affected area until emergency operations have concluded.
This remains a developing story, and additional information will be released as it becomes available.