Skipping around does no good, as roots are opportunistic and reviving roots one week only to dry them out the next is not helpful. Revive the roots and keep them active by watering the same area time after time. Homeowners also should remember to water their foundations as well as their trees and yard. When the soil dries out, the earth shrinks and the slab may shift, causing the foundation to crack. And, if the drought continues and the need to conserve water becomes stronger, people will need to begin to make some choices about where they use their water.
Trees can take a hundred years or more to replace.
And a cracked foundation is extremely costly to repair.