I turned my heating on at home last night, so whoever it was made the point about the low temp, not the high, is on to something.  The Astros haven't played this long into the year before, so the is no precedent for a cold night like the next three will be.
I say that they point to the projected low, say "bollocks" to Selig, and close the roof.  I'm going Wednesday, and I do want to be freezing my arse off!