I’m not understanding why 2-3 days after the fire a mere 20% of the building has been searched. Which means 24 corpses have been found in a mere 20% of the building. It doesn’t seem all that large a building.
I can’t recall an event here in the 45 years I’ve been out here something killed 24 people, the notable exception being the collapse of the Nimitz Freeway during the 1989 earthquake.
The reason for the delay: the roof collapsed onto the second floor, which then collapsed onto the first floor. So, it's going to take a while to remove all the debris and search it.
It may still be smoldering. We had an arson in our former urban neighborhood of an old building (with wooden structural elements) containing a restaurant, and it re-ignited several times over a period of a week or more.