Adelaide had a heatwave in summer with temperature in the mid 40's. Many gardens got frizzled. We used the central structure to attach calico sheets we prepared, and tarps, to cover most of the garden plants. Everything survived the heat. From this view you can see the planter box Geoff made with the dwarf citrus trees, and the twin trellis' (and herb boxes) which provide an 'entrance' into the central garden area - the left one with tomatoes, and the right one with rockmelon and lebanese cucumbers.