At 3 to 5km

The firestorm could extend to most of this area - destroying everything in its path. Blast would severly damage houses and fire would destroy the contents of most buildings. Many fires would be started as a result of the combined effects of heat and blast. Those in the open would receive third or second degree burns. Almost all trees would be blown down.

The area within this zone (3 - 5 kms) would be 50 square kms.