Help with Dawn Redwood recovery

Just before I posted the above, I noticed my dawn redwood forest had several droopy front leaf tips. By sundown they had curled up and French fried… Second day at 85+F. 85Fposted for the next two days, then 65 and rain…
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Water, water, water.
Will evaluate long-term temps for time to put up shade cloth. Slows down growth, but, saves trees…