But a quick response by firefighters kept damage limited to the exterior of the building, and the store was back open less than two hours later.
All customers and employees were evacuated from the store at about 4:40 p.m. as fire engines roared up to the scene, sirens blaring. A second alarm was called soon after.
Firefighters quickly determined that a generator had caught fire outside of the building, near the back corner of the store at 23475 Novelty Hill Road in Redmond. The blaze then spread to some electrical wiring.
The exterior fire was brought under control by about 5 p.m., and fire officials determined that there was no interior damage to the supermarket.
Store employees were allowed back inside by about 6 p.m., and the store was expected to reopen by 6:30 p.m.