I believe they usually do maintenance on the pitch because that's how others usually do, sometimes when they notice that the temperature is a bit high they usually water the pitch before second half will resume so that it will be easy for the players and doesn't affect them so actually on this one it could be that they did not do that, although even so i didn't notice it to be a challenge for them because Rizespor still got the lost and Galatasaray became the winner, even if struggles indicate sometimes on Galatasaray but they're better than any club now and they have not lost since beginning.
All this situations were unforseen circumstances but looking at the strength of Galatasaray circumstances will not be a reason to stop Galatasaray from winning a lower team like Rizespour. Even before all of this was noticed, in the first half Galatasaray did so well and showed that superiority over the team, their dominance was just so pronounced they swept the statistics and still got the victory in the end.