Some 600,000 residents of Tijuana and Rosarito Beach can expect to see their water deliveries shut off as soon as next weekend as a major aqueduct undergoes repairs.The shutdown, which could last from two to five days, will affect just less than one-third of the area’s 1.8 million water users living in 332colonias, or neighborhoods, across the western and southern parts of Tijuana and northern Rosarito Beach, according to the Baja California Public Service Commission, or CESPT.