Blue roofs are common in beach towns. Hell my neighbor has a blue tile roof on his mansion and I live in the mountains in CA. Umbrella's aren't fire proof so regardless of how the fire started they would have melted . My home burned down and my Trombones melted into nothing all that was left was the steel mouth pieces. My gold jewelry melted on my dresser in a room that didn't even burn. Fire decides what to burn and when to do it IE people saying houses burned but not trees. That will happen on fast moving blazes because house are easily ignited and a living green tree is not. I am open to all possibilities but avoid speculation that makes us look like we are nuts. The battle is for the minds of the normies.