people in distress emergency vehicles such as police cars, fire trucks, or ambulances flashing lights road signs or barricades hazardous materials damaged property debris or rubble smoke or flames
emergency which has people in distress emergency which has emergency vehicles such as police cars, fire trucks, or ambulances emergency which has flashing lights emergency which has road signs or barricades emergency which has hazardous materials emergency which has damaged property emergency which has debris or rubble emergency which has smoke or flames