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mentions some addresses. For example, if you search on 1701 Earl Avenue, San Bruno, CA at the burned area shows up clearly. (However, if you zoom in tighter than the 200-ft-scale level, older (pre-explosion) photos show up.)
It appears that a 5-mile circle extends about a mile into the Pacific on the west side, and a mile or so into SF Bay on the east. Scott appears to be correct that that area is among the most-lightly-populated places on the SF peninsula; it might well be that the population within 5 miles is less than 100000 people.