Officials have urged the public to avoid the area surrounding Howard, Folsom, 1st and 2nd streets. A statement was released by the head of corporate affairs saying that a “partial hydraulic failure” had occurred at the construction site. “The interior forming system and the concrete placement arm have been secured and are being evaluated by engineers to bring it back to level,” the statement continues. “If it does fall, the worst case scenario is we’re going to have some structural damage to the buildings below. We’ve been aggressively evacuating, so we’re pretty confident we won’t have any injuries,” San Francisco fire spokesman Jonathan Baxter said. No imminent danger was claimed. An engineering expert flying from out of state was expected to help manage the situation. The 35-story residential building is being developed by companies Hines and Invesco.