He mentioned it in his above post.....syringing = light, frequent misting by hand to reduce the canopy temperature, but not so much as to saturate the soil.
My rookie irrigators last year got freaked out when we got in the 100s for 5 days straight and soaked perfectly fine, beautiful greens. Three days later pythium blight (a fungal disease) broke out in mass and took a lot of turf with it. We had to apply expensive chemicals just to get it in check. Luckily, the disease mainly annialated the poa, which we're trying to keep out of our bentgrass greens, so it might have actually done us a favor in the long run, as the bent eventually filled in all the dead poa spots. But it sure didn't look that great when it was happening.
WARNING to all homeowners out there.....the same thing can happen to your lawn, and did to mine during that same heat spell last year, so beware of soaking your home lawns as well. If the grass is green or even a tad tan, don't worry about it. If you step on it and it doesn't spring back up, then put a few extra minutes of irrigation on it.