The Arctic has seen the most warming, which is concerning because the region is home to vast quantities of ice that stands to melt and raise sea levels, Schmidt said.

It is a place of farms, crofts, forests and rugged hills, vast upland moors and mountains but few people.

Including aqueduct reservoirs, the city can store more than 91 billion gallons across its vast infrastructure.

In Phoenix, for comparison, the city supplies water in a vast territory with many hills and mountains, and has nearly 80 pressure zones, Sorensen said.

Campaign experience counts a great deal in California, a vast, unruly state with more than 22 million registered voters, notwithstanding the success of those two actor-turned-politicians.