Under what circumstances do airports usually cancel flights?

Although as a student, I don't often fly, of course, I can often see the cancellation or delay of flights on TV or in various movies. And I often hear all kinds of statements such as the plane being late, but generally no one will investigate the root cause. As a matter of fact, I think most flights are cancelled because of the weather.

Because the sky is the most concerned and closely related thing when we fly, the plane is not on land or in water, which is different from the high-speed rail and train we usually take. It flies in the air, so it has a lot to do with the weather. We know that thunderstorm weather is very dangerous even on land, what's more, the plane is in the air and close to thunderstorm weather. Generally speaking, the cancellation of flight notice will be due to bad weather. For example, the airport is foggy or caught in a rainstorm, the visibility of the university is not up to standard, and the runway is not clear. If the plane cannot take off, the flight will be cancelled. If the runway is heavily covered with snow or ice, the plane cannot take off.

During the flight, if you encounter heavy rain or hail that affects the safety of the aircraft, you cannot fly. Basically, planes fly because of the weather, and some flights fly because foreign flights collide with their own flights. However, according to scientific arrangements, this situation will basically not happen. If the flight is grounded due to bad weather, it will be cancelled due to national unrest, natural disasters and other circumstances, because our plane is very dangerous. After all, it is a plane flying in the air, and there is a lot of life in it.

Therefore, for flights, our country has always been cautious and careful to avoid all kinds of accidents. Therefore, if we notify the cancellation of the flight before taking the plane, we should be glad that we didn't encounter bad weather during the flight, which led to the plane accident. So when the flight is cancelled, there must be a feeling of gratitude.