Large fires of this sort (like California) usually stop because they run out of fuel at some point, and/or the weather changes.
Firefighting emergency duties are mostly for structure and life protection......and eventually try to divert fires to pre-burned or low fuel areas.
The 1991 Oakland, CA fire too, was largely fueled by
Eucalyptus and Acacia trees, an exotic family of trees, which carry large amounts of combust-able oils in the leaves (and accumulated leaf-drop). Both are
natives of southeast Australia, and they grow well here in California, Portugal, and India. They are often ornamental trees, but some places have begun to ban them from fresh cultivation.
Eucalyptus trees were planted en-masse in CA (late 1800's), in the disappointed hopes they could be used for railroad ties....because they grew so quickly, but were prone to cracking when used as ties.
Source: https://www.youtube.com/watch?v=HEN_GU6HCBY
(older video of the Oakland firestorm......)
Source: https://www.youtube.com/watch?v=NseOhUqZAh0