How to handle the heat on race day

You’ve trained and are ready, and then the heat hits. Do you fold up your race bib and kiss your personal best goodbye? Or do you fall back on tried and true techniques to help take the edge off a day that has everyone else sipping a cool one in the shade?
For years, exercisers have been offered the same, sage advice when exercising in the heat: drink lots of water, wear light-coloured clothing, exercise during the coolest part of the day and dial down the intensity and length of your work