I'm plant sitting for a neighbor and this morning I watered her 3 plants about 6:30 and they were fine. It has reached between 101-106 degrees(I have two digital outdoor thermometer and they differ from hour to hour depending on the sun exposure.) I just went to check the plants, they have been in the shade all along..but one looks like it has croaked. I watered it and hopefully it will bounce back..If it doesn't, I don't think there is anything more that I can do unless I were to repot it but figured that might be adding more stress to the plant. I recall a conversation on one of the forums about the soil/potting mixes that some plants are planted in.