A brush fire that sparked Tuesday morning in Ramona amid a red flag warning was quickly halted by Cal Fire San Diego crews. Crews responded around 6:50 a.m. to the fire near Pamo Road and West Haveford Road. Calfire said the fire grew to 10 acres and was threatening one structure but by 8 a.m., Cal Fire updated the acreage to 3.5. #PamoFire [Update] Due to more accurate mapping, the fire is listed at 3.5 acres. Fire crew will remain on scene to strengthen control lines and mitigate any hazards. CAL FIRE law-enforcement officers are on scene investigating the origin and cause of this fire. pic.twitter.com/EDSurLK0H0— CAL FIRE/San Diego County Fire (@CALFIRESANDIEGO) January 14, 2025 Within a half-hour, crews had the fire’s spread halted. It was 100% contained by 11 a.m. thanks, in part, to favorable wind conditions, a Cal Fire crew member at the scene told NBC 7. Investigators later determined the cause of the fire to be “related to smoking.” “We remind residents to remain vigilant and to limit outdoor activities that can create sparks or start additional wildfires,” the agency said in a post on X. Please refresh this page for updates on this story. Details may change as more information becomes available.