In the latest and possibly most severe evidence yet of California’s worsening drought, the federal government on Wednesday announced it will cut water deliveries to urban areas it serves by more than half — and to zero for many farmers across the Central Valley.

The move will result in mandatory water restrictions across Santa Clara County, said Rick Callender, CEO of the Santa Clara Valley Water District, which provides water to 2 million people.

“We are truly in an emergency situation,” Callender said. “We’re going to be seeking everything we can do to address this emergency. The public should expect tighter restrictions.”