They will survive the weekend, they could survive the whole grow at temps that high. My last grow i didnt take any measures to control the heat; my temps were at a constant 90F if not higher. They all survived and i got a qp off five plants. I didnt even have a hood and i was using a thousand watt switchable. Some times i would run a 400 watt hps along with the 1000watt set to mh! It would get real hot but they survived. Altho the bud was real shitty an not worth the stress of having a few plants