Heat of the morning

So I went out to run this morning at 7:00 am. As soon as I walked out the door, I knew it would be a difficult 4 miles.  It was about 80 degrees and a dew point of 70.  I crashed at about mile 3.  If I had run the opposite direction, I would have hit some U of M sprinklers along the way, but the way I went, I only hit the long unshaded area all the way down Larpenteur.  My legs were dragging for the last mile up-hill on Cleveland. 460 miles....40 to go for 500 since December.