The desert-like grounds around the San Diego County Water Authority offices are dressed in a water-wise xeriscape of cacti and aloe. The sky is a monotone blue and — even though it’s January — the temperature is in the 80s. Dennis Cushman, assistant general manager for the Water Authority, doesn’t look very comfortable in this setting in his dark wool suit. But when asked about the county’s water supply, he said he is actually feeling pretty good, because San Diego has plenty of water for 2018.