This heat increases physical stress and can interfere with concentration. It also requires buying more fluids to drink, raises the electric bill to alarming levels (power hungry air conditioning) and therefore adds more stress that way also. If I feel the need to get away for a bit and visit the library or relax in a park, I am sweaty and tired by the time I get there (I walk/take public transportation) so it even makes relaxation less relaxing! I can't wait for fall weather to kick in...