As the longest-ever government shutdown reached Day 27 Thursday, the number of federal employees working without pay is up to 450,000 and could top half a million in the coming days, as the Trump administration continues to recall tens of thousands of workers after almost four weeks of shuttered doors at vital agencies.

The negative impact on the U.S. economy, which the White House now says will be double its original projections, is already affecting places like Colorado, where craft breweries are awaiting government approval on beers. Private contractors, some of whom are now without work they were on projects with government agencies, and unlike furloughed federal workers, aren’t guaranteed any back-pay.

The effect on contractors, Council of Economic Advisers Chairman Kevin Hassett said Tuesday, was one reason the White House upped its new estimate of the shutdown’s cost.