I wish I knew the answer. I also SUFFER from heat induced migraines. Mine are from working out, gardening, walking, working on my pool in my yard, or just being warm in general. I have stopped my Step Aerobics, and started Yoga, in hopes of the deep breathing and stretching doing me some good. I have been tracking my migraines, and average 7 a month. I would like to wipe 7 days a month from any doctors calendar, and I'm sure they'd figure out the root cause. I take Imitrex, because that's what my insurance (HMO Cigna) will cover. I am 48yrs. old, 5'7"tall and about 155lbs. If someone can pls. help I would greatly appreciate it. I will be without a husband soon if I don't find a cure. -LC