Japanese summers are tough to handle. Very hot and very humid. Be careful out there.
Todays idiom is "back to square one".
This means to go back to the beginning.
I want to start a new business, so I looked at several franchises, but I couldn't find anything I was interested in. Now I'm back to square one.
I had to go back to square one after spending days trying to solve a problem at work. It's so frustrating.