Drought by Bert Kaufmann
Be sure your plants have a good layer of organic mulch to retain as much moisture as possible.
If your town does not allow watering your garden during the drought period there is not much you can do. People and animals come first.
If you are allowed to water, remember that the best time to water is in the early morning hours before the sun comes up and temperatures start to rise. Water as close to the ground as possible so that the water gets to the roots of the plants. Water deeply, not superficially. If you cannot water early, next best is to water after the sun goes down in the evening. Again water close to the ground. If water stays on the leaves, fungus can grow – that is why morning watering is best for the water to evaporate off any watered leaves. (see here)