It is true that excessive heat can cause bud blast in some orchids. But moving an orchid to a different environment when it's in bud is just as likely and probably more likely to cause bud blast. Sudden changes in environmental conditions is mentioned most often as the cause for bud blast.
What I do is keep notes on my orchids and referring back to them I find that it's the same few orchids each year that tend to suffer from bud blast. Then I can slightly change the environment that I grow those particular orchids in until I have success blooming them.