https://www.mercurynews.com/2022/04/10/san-jose-fd-home-depot-fire-appeared-to-start-in-lumber-section/

The fire that tore through a Home Depot in South San Jose with such ferocity that orbiting satellites could detect its heat signature was first reported around the lumber section tucked in the back corner of the store, fire investigators announced Sunday.

Hot spots continued to send up smoke Sunday from the building’s smoldering remains as firefighters continued pouring water on the store and investigators worked to narrow down a cause of the blaze.