"...sources with knowledge of the incident have told news outlets that it appears to have been intentionally set and that the storage of wood pallets and hand sanitizer under the overpass contributed to the intensity of the blaze. Both wood pallets and hand sanitizer are known to fuel fires."

Why was there bulk pallets and hand sanitizer? It's basically kindling, with a napalm icing. Look at the photo. It is likely this product was stored there due to it was removed from somewhere else where it was illegally stored. And it was likely to be a business operating illegally, without the proper licenses and permits. Or they needed to dispose of the product and simply did not want to pay for it.

Governor Newsom has already acknowledged this was and is a failure of governance.