- It's a horizontal or inline list (look at the semicolons!).
- It's unordered.
- It's 2-level:
- Locations are the categories.
- Effects of fire are the list items.
This is a good example of a list in a fictional narrative.
Terry Pratchett needed to burn his fantasy city of Ankh-Morpork and describe that in a way that sounded realistic.
So he lists the effects that the fire has when it burns different parts of the city.
(Note: If you wanted, you could make a case that this is a matrix because each location has the same two properties: fuel & effect.)