My vehicle overheated

Hello, first of all, I went out of the city with my car yesterday, with the air conditioning on, I went for 15 km or so between 120-130 and it was noon, I suddenly realized that the stop sign was on and the temperature indicator was almost red. There seems to be no problem, but this problem was very annoying for me.

I have owned many 206 and 306 vehicles, although I do not understand the logic of reaching that level at those speeds and with the air conditioning on, on urban slopes, etc., this situation is quite normal. Reducing water in the vehicle, boiling water, etc. any signs of actual heat? Were the fans running? I think this is due to the extra power usage of the air conditioner. If there are no signs of heat, I suggest you show it to an electrician.