cats are endothermic: all the heat in the room gravitates towards the
cat who soaks it up.

brush the cat once a day, deep brush once a week; brush the furniture
once a day; wash your hands after playing with the cat.

pat
used to be allergic

I have several rooms that are nicely air conditioned.   Even on days
when the termperature approaches 100 and the dew point is 76,
my cats will be in the hall or one of the hotest rooms in the house.

Why?  Cats like warm temperatures (these are the same cats who
park themselves on the radiator/heat register in the middle of winter)
Cats also hate the noise from the air conditioner, the cold air, and
the draft.  

You should make sure the cats have water 24/7.

Check with your local health food store.  I've heard of some having
success with some diet changes for the cat.  
------------------------------------------

http://www.barnabascollins.blogspot.com

Ask your doctor to check with recent medical journals.

Here in southern Florida our cat would rather be out on our lanai all night
if we let him even in the most humid hottest night.  In the daytime he found
a shady spot out of the sun but it was still hot.

Cats evolved on the hot deserts of North Africa.  Our cats are all
descendants of the African Wildcat, a/k/a  Felis silvestris lybica and well
suited to hot weather.  Don't forget, the cat's normal body temperature
(101-102 deg F) would be fever for us so a cat doesn't begin to feel
uncomfortable until the temp rises to about 105*F.

You're probably allergic to Fel D1 ("Felis domesticus"), its a glycoprotein
that's secreted by sebaceous glands in the cat's skin- and to a lesser
extent, in the cat's saliva.  Male cats secrete more Fel D1 than females-
and some cats of the same sex secrete more Fel D1 than others.  That's why
some people are 'allergic' to one cat, but not another.

When Fel D1 dries on the cat's coat it becomes airborne and easily inhaled
where it causes allergic reactions in people who are sensitive to it.  You
can reduce the accumulation of Fel D1 on the cat's coat by wiping him down
every day with a damp cloth.  This should also reduce your symptoms. The
chin and cheeks areas are especially rich in sebaceous glands (that's why
cats mark people and items with their cheeks) so extra attention should be
given to these areas.

You must also vacuum your home and furniture and cat's bedding very
thoroughly to remove Fel D1 that's already present before you begin treating
your cat, otherwise the Fel D1 in the environment will cling to your cat
when he lies in his favorite spots.

You can also buy a product called "Allerpet" which significantly reduces the
concentration of Fel D1 on the cat.  IIRC, Allerpet costs about $10/12 oz -
a bottle lasts for several months with one cat.
Good luck.

Phil