Perms and hair color. You can color hair that has been permed, but try to use a semi-permanent or 'no-ammonia' color instead of a normal permanent color (which uses ammonia and 20 volume peroxide). Have your hair permed first.
Mowing grass works best when the grass is dry, as grass tends to bend over from the weight of the rain, making it difficult to get a straight cut. It also clumps inside your mower cavity and on your lawn, which can lead to dead grass underneath the clumps if not raked promptly.
(If you simply must plant in hot weather, mulch the planting area with a light layer of peat moss or similar material to prevent the seed from drying out.) Where you live, and throughout much of the northern half of the U.S., early fall is the best time for sowing grass.