2:46 PM: A big Seattle Fire Department response is headed for the 3200 block of SW Avalon Way. The dispatch is “a report of a fire on the fifth floor.” Updates to come.

2:52 PM: Arriving crews say nothing’s visible, so they’re “investigating.” Avoid Avalon in that area as it’s being blocked – between Genesee and 35th – by/for the response.

2:56 PM: They’re not finding anything – apparently a work crew’s “dust” was mistaken for smoke – so most responding units are being dismissed.

3:10 PM: Call closed, so Avalon should be getting back to normal.