"Double Duty"

If you didn't see the red beacon on the old Grapevine TX Fire Engine as it roared down the street, you'd hear the distinctive wail as it made its way to another emergency. At least this was a step up from the old hand-cranked siren, and since it was electrically powered, a functional light was added. But like so many things, this antique warning mainstay has been replaced with concealed digital models that are more piercing and powerful, even giving emergency responders a choice of sounds to alert the public that there's trouble brewing, so clear the way.