Mae, how hot has it been there? We are running about 35-38 here during the day and I am dropping some here as well. I attribute it to the heat. I just had one flower on the Brug your cutting came from that bloomed 18" long but only lasted 3 days and then dropped off. There are another 30 or so buds for the next flush and they are about 3-4" long and some are dropping.
Sorry this pic is out of focus but the flower dropped before I got a clearer image.

{{gwi:514330}}

35-38 deg, WOW thats hot! Its only about the mid 20's here. Plenty hot enough for me but don't think its should be a problem at all for the brugs. I have it in a large container so thinking maybe its not drying out enough between watering and maybe not enough roots to take up the water, we have gotten rain the last week also. It is really healthy looking and don't even have any yellow leaves.
Guess I'll be experiencing the hot weather soon. Coming to Ontario on the weekend for two weeks.

My buds also all fell off it was 38 here(100 degrees Farenheit)