Well, still nothing about sprinklers, but it appears that the orphans of Itasca did well in the aftermath. (Also worthy of note: the school housed only 100 orphans anyway, so that many people could not possibly have died. Really, nobody died at all, but I just wanted to point that out.)
"Orphan Home Gives Report of Progress," Dallas Morning News
16 November 1940, p. 6:
... The new home for little boys is one of the show spots on the campus this year. It was built to replace one which burned last January. ...
ETA: Also, the book mentioned earlier does publish the story. See here.
Unfortunately the notes are not included in the preview.