**Cheektowaga NY**\rbrU-Crest alerted for an electrical fire from the panel box in basement. Working fire \rbrdeclared with heavy smoke showing from #2 side. Crews make entry from front \rbrdoor searching for basement stairs. Heavy fire makes way into 1st floor on #2 side \rbrcausing ammunition to begin going off. Crews are evacuated from structure for \rbrDefensive Operations. Fire climbs exterior wall into attic and becomes fully \rbrinvolved. 1 FF hurt with minor injuries.\rbr5 -1¾, 1- 3 deluge monitor in use & U-Crest Truck 6 flowing.