The operators of the Three Gorges Dam on the Yangtze River have pushed back filling the reservoir for winter storage for a week to discharge more water for drought-stricken areas downstream, Xinhua reports.Nearly 1.5 million people in the Hunan, Jiangxi and Guangdong provinces have reported drinking water shortages over the last month.The reservoir is filled in the autumn to prepare for the dry season, which runs from December to March. Winter releases then drop the water level by 30 meters, providing space to regulate the spring and summer flood season.