Office Building, Other Business Simi Valley, CA – Sprinkler system activates to assist firefighters in commercial business fire December 5, 2018 viking210 Firefighters responded to a commercial structure on fire in Simi Valley on Saturday evening. The fire was reported at 5:49 p.m. at 67 W. Easy St. The building is part of an office park called Simi Business Park West. Firefighters arrived on the scene to find smoke coming out of the two-story building and the sprinkler system activated. The fire was knocked down at 6:18 p.m., authorities said