Temp Warm-up For Marathon?

Race officials and runners alike are keeping a wary eye on Sunday's weather forecast after last year's heat-plagued race in which more than 300 people were treated for heat exhaustion and one man even died. Officials claimed they turned back participants who had not reached the half-way point by 3.5 hours into the race while allowing the rest to finish [not true as I and several other runners were herded back to the Start Line in spite of being well past the half-way point, but I digress...] because of the extreme temperatures and ridonkulous lack of water and Gatorade. As of this afternoon, the National Weather Service is predicting sunny skies and a high of around 76.