Heavy rainfall caused by the interaction of Tropical Storm Lionrock and a tropical depression could relieve Keelung's water shortage problem, the Central Weather Bureau said Monday. Rainfall in Keelung reached 104 millimeters between 12: 00 a.m. and 1: 20 p.m. Monday and was expected to increase in the next few days, the bureau said. Before the downpour, Taiwan Water Supply Corp. (TWSC) was considering the implementation of second-stage water rationing measures in Keelung, known as Taiwan's 'Rain City, ' beginning Sept. 1. With the Hsinshan Reservoir water level dropping below the safe storage level this summer, Keelung and Taipei County's Sijhih began first-stage water rationing, which involves decreasing the water pressure at night. TWSC said that second-stage measures would target heavy water users, forcing swimming pools, saunas, car washes, spas and similar facilities to cut their water usage to 20 percent of their monthly average. 