If a suburb has older housing stock with older gardens, for instance, it’s absolutely ripe for a fire to spread quickly. If you have more modern housing stock (which is usually better at defending against ember attack), and the houses are more spaced apart and the gardens are clearer, then you might be OK.

ok but what if we have “more modern housing stock” clad in flammable material and clustered together up each others arses cheek to jowl and excuse me, 1666 London is calling…