In the heat of the day

Yup, we're in the midst of the hottest time of year here.  January, February and March are v-e-r-y warm in our area.  My poor gem squash, butternut and pumpkins are taking strain... Last week, the temperature hit 36oC in the shade. According to the pool thermometerwhich I have hanging outside the kitchendoor it was 36oC in the shade As this is the first summer that we have had to care