With all the rain and humidity we've had recently, the greens have started turning an orange color. When that happens, we know that the turf isn't getting the oxygen it needs.
10 and 18 are usually the worst, they tend to hold water more than the other greens.
When the turf needs oxygen, the best way to remedy this is to aerify. Today we solid tined all the greens, let them breathe for a few hours, then rolled them smooth for this afternoon's play. With the extended forecast showing little change, I would expect we will do this again next week.