1, the rainstorm flight will not be cancelled. Rainy days can lead to low-altitude downward flow. When an airplane flies into this area, it may lose some lift, and the greater the rainfall, the greater the downward flow, and the greater the probability and magnitude of altitude drop. There may be delays in general, but the flight will not be cancelled.

2. Heavy rain refers to rain with high precipitation intensity, which is often formed in cumulonimbus clouds. According to China's meteorological regulations, heavy rainfall with 24-hour precipitation exceeding 50 mm is called rainstorm. According to its precipitation intensity, it is divided into three grades, namely, 24-hour precipitation of 50-99.9 mm is called rainstorm, 100-249.9 mm is called rainstorm, and more than 250 mm is called torrential rain. However, due to the different characteristics of precipitation and topography, the standards of rainstorm and flood are different in different places.