Is it better to leave a single cat at home and have a sitter look in or take it to a vet kennel?

I have a very social, cuddly cat and am going out of town for the weekend. Should I leave her in the house by herself and have a sitter look in on her once or twice a day or should I send her to the kennel at our vet where she will be in a cage? It is supposed to be really hot this weekend and we don’t have A/C. Are cats known for being able to stand heat? They evolved from desert animals, right? Should she stay or should she go?