All was quiet on Hagen Lane the morning after fire gutted a yellow brick house on the tree-lined Flossmoor street.
Three fir trees, unharmed by the fire, stood tall against a cloudless blue sky. Bushes outside the house were still covered with Halloween decorations.
Behind them, construction workers boarded up windows that were blown out by what some neighbors said appeared to be an explosion.
Fire officials said the cause of Saturday’s blaze is under investigation. One resident…
