Last week, Governor Jerry Brown made water conservation mandatory in the drought-stricken state of California. "As Californians, we have to pull together and save water in every way we can," he said.
But if the four-year drought continues, conservation alone — at least what's required by the governor's plan — won't fix the problem.
Across California, communities are examining all options to avoid running out of water. Some, like the coastal city of Santa Barbara, are looking to the past for inspiration.