I live in Kansas, and this heat is unbelievable....the humidity is high and the heat index for the next 6-7 days (at least) will be over 100 degrees!  It been that way, all ready, for quite a while.  It's gotten to the point where even putting my chickens in the shade with a large fan was not keeping them cool enough...they were hardly eating and their mouths hung open.  I cannot believe what I had to do.....I am even embarrassed....I brought my chickens into our basement during the hottest part of the day!!  I partitioned off an approximately 15' X 15' area, put newspapers down and pine shavings.  They are making a horrible mess!  But it's better than having them suffer and maybe die!
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One tolerant husband, one mini aussie, 2 SLW's, 3 barred rocks and 2 buff orpingtons