Which way should I direct a fan while the A/C is busted?

Before I got central air in my house, I would put a large fan in the window facing east towards Lake Michigan and suck the air into the house and, on the opposite end of the hall, I had a fan in the window blowing air out. That created a current that kept the upstairs comfortable except on super hot days. I read somewhere that, when the temperature reaches 95 degrees, fans are pretty much ineffective in terms of cooling.