Global warming is real. I can even feel the heat as I'm typing this. The room fan is at maximum speed and the windows are wide open, but the heat still surrounds me.
It would be virtually impossible to return back to the old days where it was much cooler then. The world will only get hotter from now on if we don't do anything. If you cannot plant a tree, at least have a few potted plants around your residence to reduce carbon dioxide, the gas which traps hot air.
So, here's a friendly reminder to drink more water and stay hydrated. Use an umbrella to shield yourself from the scotching sun during daytime.