As it stands, PHIVOLCS is saying that we are currently observing symptoms and behavior similar to that of the 1911 Taal eruption. A detailed account of that eruption can be seen on the link below:

TAAL VOLCANO | Facts and Details

Basically, many villages and barangays were wiped out, with many of these having ZERO casualties. This is the reason why PHIVOLCS are advising people not to go back to their homes.