It's an act of God. There have been occasions where the blood didn't liquify, and disasters strike shortly afterwards. The lack of liquification on the feast day is an omen.
That's the second time you've said that you're a "heretic." Don't be self-conscious. You're closer to Catholics than you think. ;-)
Blessed be God in His angels and in His saints. I was worried when I heard it was his feast day. Thank God again.