TAIPEI, Taiwan—Typhoon Chanthu drenched Taiwan with heavy rain Sunday as the storm’s center passed the island’s east coast heading for Shanghai. On the Chinese mainland, authorities issued a typhoon warning for Shanghai and warned of possible torrential rains. Airline flights and train service in Taiwan were suspended Saturday as the storm approached. The Central News Agency reported more than 2,000 people were evacuated from flood-prone areas of the east coast county of Hualien. At midday Sunday, Chanthu’s center was about 70 kilometers (45 miles) off Taiwan’s northeast coast, with winds of 162 kph (101 mph) and gusts up to 198 kph (124 mph), according to the Central Weather Bureau. Up to 13 centimeters (5 inches) of rain fell Sunday in some areas, the Weather Bureau said. It said up to 20 centimeters (8 inches) was forecast. Heavy rain also fell on Taipei, the capital, and other parts of the island. …