Asphalt shingles of today do have a much better fire rating than, 10 yrs ago!The wind created by the wild fire will allow embers to fly in every direction,including under the eves,into the vents,& under the shingles themselves.Swimming pools/Water tanks have saved many homes,many times,I have also seen Full swimming pools full of debris,next to the slab that once contained a home.I wish the Blast family the Best of Luck,& All of Texas for that matter,Be Safe!