Nellysgirl I've been putting a baby bath filled with cold water and ice cubes next to the bed. Every time I feel a hot flush coming on I simply swing my legs out of bed and plonk my feet in the water for five minutes.
Another thread (I'm not sure if it was on MN as my memory is not what it was) suggested putting on a pair of wet socks, if you don't mind damp sheets. There is a strange sock shortage going on in our house at the moment as I threw them all away in a fit of odd-sock pique when sorting out the laundry a few weeks ago (with the intention of buying a couple of multi-packs from Primark) ... but I've found a wet pillowcase to be quite effective.
Alternatively, you could try leaving the bathwater to go cold after you've had a bath. I've done this a couple of times and have been known to come downstairs and sit in the bath in the dark at 3am!
I've also been daydreaming that I'm in Greece, on the beach front, eating Greek salad in between swims in the very cold sea.
sighs