As these aerial photos from The Post prove, Hollywood celebrities like Kim Kardashian, Barbra Streisand and Jennifer Lopez continue to suck up water to keep their gardens fresh and lawns green, while Southern California withers from a devastating drought. Experts predict California reservoirs have less than a year’s worth of drinking water left. An emergency law passed last week forces local cities to conserve water immediately. The Las Virgenes Municipal Water District, which supplies many of these elite enclaves north of Los Angeles, will have four weeks starting next month to cut water use by a staggering 36 percent. But the mandate is...