"A flat-bed trailer is parked on the closed boat ramp of a Lake Travis marina Friday, July 24, 2009, near the Village of Briarcliff, Texas. Lake Travis is about 31-feet below average level for July. The lake was nearly this low in 1984. Cities across Texas are urging residents to cut way back on water usage, especially in areas hit hardest by drought conditions. (AP) -- Off-duty police officers are patrolling streets, looking for people illegally watering their lawns and gardens. Residents are encouraged to stealthily rat out water scofflaws on a 24-hour hot line. One Texas lake has dipped so low that stolen cars dumped years ago are peeking up through the waterline. "