SAN DIEGO - Jack Frost visited San Diego County overnight, leaving behind frozen pipes and icy conditions on some roads.

San Diego Water Department spokeswoman Tedi Jackson said customers in various parts of the city reported frozen water pipes in the wake of the area's cold snap.

San Diego police said heavy ice was reported on local streets during the early morning hours in the 2000 block of Euclid Avenue in Chollas Creek and 5500 block of Regents Road in University City.

A water leak on private property caused some flooding and slippery conditions for vehicles at 10th Avenue and Ash Street downtown about 7 a.m., according to Jackson.

There were no reports of any traffic crashes related to the water leak and the ice.

The National Weather Service said coastal temperatures were expected to dip into the 30s and 40s overnight; patchy frost was predicted in the valleys with temperatures of 24 to 34; mountain temperatures were expected to be a chilly 15 to 25 degrees.

A six-inch cast iron water pipe broke in Point Loma about 10:30 a.m. between the 700 and 800 blocks of Golden Park Avenue, leaving about 30 homes without water, Jackson said.

She said the water was shut off about noon, and was expected to be off until about 6 p.m.

It was unclear whether the main break was caused by the cold weather.