Here’s what you need to know about the federal SNAP program, which provides food assistance to nearly one in eight Americans. It could go dark on Saturday.

The Department of Agriculture has said benefits from the Supplemental Nutrition Assistance Program will not be issued in November, claiming “the well has run dry.”

The SNAP program provides food stamps to more than 40 million Americans. The program is on the verge of running out of fund because of the government shutdown.