They can withstand temperatures in the 100s without too many problems. But if it's very hot and very dry, the leaves and traps will brown around the edges and show other signs of stress. In climates such as yours, it's best to give them full sunlight during the morning hours and then when temperatures start creeping above 95°F or so, put them under a 40%-60% shade cloth or in dappled sunlight under a tree.