Why is it so hot in Tianjin in September 10?

The reason why Tianjin is still so hot in September 10 is global warming. According to the 24 solar terms, as early as August 7th and August 19 in beginning of autumn, the last days of the dog days have ended. However, in mid-September, the weather in many places, including Tianjin, is still hot, because in recent years, the whole world is getting warmer and the summer season moves back and forth. The tail of spring is shortened, the early stage of autumn is shortened, and the time span of the whole summer is extended.