Sorry to hear you may think the Yucca linearifolia had died. I will steer clear of that as it had been on a wish list!
Will the Yucca arkansana ssp. freemanii return ok?
I didnt use heat on my Trachycarpus 'nainital' and the spear pulled and it looks like compost. It was about knee high, I hope yours makes a full recover!
Tim, I hope the Yucca gloriosa 'Treculeana form' from Tenn makes a good recovery. They are pristine here, not a blemish while Elata and Torreyi died.
Blue Sapphire rostrata did very well. An isolated bleached blade here and there but proud of that!
Is the Yucca gloriosa x elata #2 ok?

Thanks Tim! good update but another soon would be helpful!