I get 116 F / 46.7C days every summer. The only orchid I leave out is Eulophia petersii. The others can't take that without a lot of damage.
Of course, when it's that hot here, nights are usually in the 85-90 F / 30-32C range. If you have cooler nights some of your Cattleyas with C. purpurata ancestry and some Cymbidiums might survive those day temperatures. I spray down the foliage often on hot days, before it gets so hot I bring them in.
__________________ May the bridges I've burned light my way.