lol, we went to Kings Island yesterday and on the way home ran into some rain. Temp dropped from 107 to 73 and back up to 102 in a matter of 20 minutes.
thats what I was told where my wife used to work they had a ash tree and was able to treat it. the owner was selling and was afraid they were going to have to put in a equal sized tree.
This, you should be able to treat them. cutting should only be the last resort. Also be thankful you don't live in Dublin if you remove a tree from your land it has to be replaced with a equal sized tree.