I think you have a very easy fix for the run, if you want you can mount couble osp sheets on the front so it will creat big shade for them, you also can try to put one of the white tarp on top ( the tarp the landscapers use) then if it rains, water will not whigh the tarp down, ad white will help keep the temp down.
Good Luck.
Omran
Good Luck.
Omran