Be careful, fellow gardeners. I just read this on Kirk Mellish's blog. He is the meteorologist for WSB.
Anyway.... I did not realize that the heat index -- the "feels like" temperature -- is what it feels like in the SHADE!
He said in the sun, add 15 degrees. Woah. That is pretty extreme.
So be sensible. It has been hard not getting out there these last few days!