Homeowners in Brownstone Brooklyn are anxious about their rooflines. “Someone was giving out flyers today on my block … about ‘mandatory’ parapet wall inspections,” one wrote on a Brownstoner forum.

According to the department, the incident happened some time overnight on Wednesday, Aug. 7. Around 100 parapet caps were removed from the Carothers Parkway bridge near Ryecroft Lane and tossed into ...