(WSB photos)

12:49 PM: Thanks for the tips – a natural-gas leak in The Triangle is reported to have led to the evacuation of the West Seattle YMCA (WSB sponsor) – early word is that it’s not believed to be at the Y itself, but Seattle Fire is at the scene and making sure everybody’s safe. We’re en route and will have an update.

12:58 PM: Fire and police vehicles are blocking eastbound Avalon just west of 35th, so avoid the area.

1:11 PM: Seattle Fire is leaving. They tell us they’ve done some safety checks, and Puget Sound Energy is on the scene, and it’s been determined it’s safe for those evacuated to go back in. Per comments, Alki Lumber was among those evacuated, and firefighters tell us the Luna construction site was too – we saw hard-hat workers standing on the north side of Avalon. Josh Sutton from the Y says it’s reopening at 1:30 pm.