For me, I had heat into the 100's F, but hardly any drought, so my results will have a different meaning. So ...
It seems anything with Lilium henryi parentage did quite well: White Henryi, Louise, and the rest of the Aurelian group. The closely related Lilium rosthornii also did well.
This turned out to be a good test for Triumphator. Other years, I have had heat and drought, and the flowers bloomed, but petals were very limp, sagged badly and short lasting. This year being even hotter but with fairly ample rainfall, flowers were very satisfactory.
