Planted an 8 foot Drake Elm in backyard 3 weeks ago. It is very hot here in south Louisiana but we have a mister in bed as well as garden hose on low next to trunk several times a week. We went out of town for a few days and now ALL the leaves have turned brown. Trunk and limbs when knicked are green still and leaves are not brittle. Can my tree be saved? What can I do? Hammond, Louisiana in July temperatures in high 80s/low 90s.