The firefighters were fighting a weed fire near Brentwood on Wednesday afternoon, which caused evacuation warnings, authorities reported. The Fire Department of Contra Costa County reported in X, around 6:30 p.m., that the gangs were fighting a 10-acre weed fire in the Deer Valley and Balfour highways area. At one point, the Brentwood Police Department issued an evacuation warning alert for the Shadow Lakes neighborhood. Just before 7 p.m., the …