Tired of bicycling or adjusting to hot weather

The last few days I have been riding every day 50 - 66 km. But all of a sudden the weather has turned very hot and I guess I am not used to it.

 Silver getting a break in the shade 

Doing some stretches in the shade

 Davignon Creek

Tired!

Practise Riding every day

Every day I go riding. One day I do a very long ride and the next day I swim in the morning and do a shorter ride in the afternoon.