I keep my blooming AV's on an east exposure window sill......they normally do quite well, but I noticed they are getting brown spots on the petals. I went to Dr Optimara and that lists sunburn as one of the possible causes. The only thing that has been different in the past few days is that it has been scorching hot.....35 degrees celsius, roughly 100 farenheit...i think. Is this enough to burn them on a really hot day....they do get direct sun in the mornings, and for the past couple mornings, it has been super hot right from sunrise. Should I be moving them away from the sill on a really hot day, does anyone else have this happen to them??

Thanks for your input everyone!!

Tracy