When is a landowner responsible for a fire that spreads beyond his property?

Property damages claims:

Here, in the Western Cape; it is now “Fire Season”; and the local authorities have their hands full with seasonal wildfires.

Some of them have been devastating and Bettys Baylost more than 40 dwellings in a wildfire a few weeks ago; which was fanned by gale force winds. That fire was allegedly started as a result of a man deliberately or negligently firing a flare onto the mountainside above the holiday town. He has now appeared in the Caledon Magistrates Court and faces a string of charges.