TRACY, Calif. (AP) — Firefighters responding to a blaze that destroyed a massive medical equipment warehouse in Northern California and sent embers flying for miles were hindered by sprinklers and hydrants that weren’t working, authorities said Friday.

The 1 million-square-foot (93,000-square-meter) warehouse in Tracy, a city about 55 miles (88.5 kilometers) east of San Francisco, supplied medical equipment to area hospitals. It’s owned by Medline, a major medical-surgical products provider of equipment such as latex gloves, masks, surgical instruments and other medical supplies.