April 4: Red halo

Looked up in the night sky to see a big blurry red halo almost entirely encircling the waxing gibbous moon. We've been watching the HBO series, "Game of Thrones," in which a red comet appears in the sky as an omen, we're told, of dragons. What might a red halo portend? Global warming?

Fat moon, red halo.
An omen: are dragons here?
Are we due some fire?