I noticed that one of my tires was low so I pumped it up with a hand pump and took it in to the Canadian Tire to fix. After dropping it off, I walked (in sweltering heat) to my parent's house where mom was holding her garage sale in preparation for her move. I'd helped her put up signs the other day and one customer remarked that this sale had sign EVERYWHERE. When I went to pick up the car, I found out that there was a nail in a place they couldn't fix and that all the tires were getting dangerously worn. I replace all four. Another huge rainstorm cooled everything off.