Q.Clementine tree
My clementine tree is planted outside in Arizona where we are having temps around 109 degrees at the present time. I water my tree every night with 4 gallons of water. Four days a week it also gets 4 gallons in the morning. It has many clementines on it and during the last 2 days it has dropped 2 clementines each day. I am concerned as soon it will have no fruit left. I don’t know if it is getting too much water, too little water, or needs fertilizer. Can you help me?

These links will help you determine the correct water schedule.
https://extension.arizona.edu/sites/extension.arizona.edu/files/pubs/az1151.pdf
https://www.gardeningknowhow.com/edible/fruits/citrus/tip-on-water-requirements-for-citrus-trees.htm