I live on a cliff overlooking a river valley in the desert. For the past few years there have been floods. This last year was the largest in what some say was 50 years or longer. Most of the rest of the year the river is dried up and bushes and trees grow very fast down there. The flood washed away all the vegetation and brought in boulders from up stream that were as large as basketballs. It also took part of a trailer park away that was too close to the river down stream. The river got up to 35 feet deep! There are a few very large hardy trees that grow in the river valley. They seem to have an abundance of green leaves all summer in 100+ temperatures and no water? After this huge flood, I noticed this young tree on the bank that even though it was mostly under water during the flood, was still standing.