In addition to the precautions taken in zone 1, there are some key improvements to make in the 10-30 metre zone. You have direct control over the fuel load surrounding you.
Clear deadfall and woody debris from the forest floor.
Thin forest to a spacing of 3 metres apart at the widest part of the tree to prevent fire spread.
Prune limbs from the ground to a height of 2 metres. These are called ladder fuels and encourage fire to spread from the ground to the crowns of trees, where it can spread much more aggressively.
Fire travels more quickly up slopes. If your home is on or at the top of a slope, extend Zone 1 improvements and maintenance further from your home.