Cool & Medium Growing Orchids

[Faz]

What happens to cool and medium growing orchids if they receive a lot of extremely hot weather? On the west coast of Canada we had temperatures for 2 to 3 weeks averaging 32C to 39C. I noticed a lot of my orchid leaves are turning yellow. Would this be the result of high temperatures? There was'nt any way to keep the plants cooler. I grow mainly indoors so I could not provide misting for them. I tried to keep water dishes underneath them for moisture.....

32C - 39C = 94F - 108F (Approximately)

Thanks for your replies,
Faz.

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