What does summer heat mean? What does this mean?

The arrival of the summer solar term means that the hot summer is coming to an end.

Being in the heat is "out of the heat", that is, out of the heat. That is to say. The intense heat means the end of the hot summer. At this time, the summer heat gradually subsided, and the transition from hot to cool. But in fact, the weather will not gradually cool down, but will continue to be hot.