I watched the news report on this and was shocked at how many people had left dogs in there cars while at the horse show. I would never leave my dogs for that length of time .
In short, as mentioned, there were a number of 'running fuel fires' from all the fuel tanks meaning that instead of the fire/heat mainly rising it was spreading laterally and from below due to the fuel running downwards. 70% of heat rises with 30% radiating laterally meaning that the intensity grew with each fuel tank bursting. 1400 cars and let's just say 50 litres each = 70000 litres of fuel being added to the blaze at intervals (then there's the cars themselves, oil, magnesium, plastics, fabrics etc etc). Concrete itself does not burn as it gives off no vapours when heated to propagate and maintain fire. It will be affected due to the expansion of rebar but this takes time as concrete takes time to absorb heat though at these temperatures for 3 hours it would 'fail' in places.One car catches fire in a multi storey car park in Liverpool and it destroys 1,400 other vehicles. WHY?
Tony.
ps. Does that mean the heat will have caused the building to be demolished?