At least 20 airports in east China are now experiencing flight delays or cancellations on a large scale this week.
The Civil Aviation Administration of China was forced to issue a red alert yesterday afternoon.
Red is the highest alert for flight disruptions.
Shanghai's two airports, Pudong and Hongqiao, remain the most affected, with 160 flights cancelled and another 40 delayed through yesterday.
China's air traffic regulators contend bad weather is the main reason for the delays, arguing the military drills currently taking place in parts of central and eastern China are having only limited impact on civil aviation.
Zhou Qing with China Eastern Airlines is warning passengers to pr
