How Do Bushfires Start

Four out of five wildfires are started by people, but dry weather, drought, and strong winds can create a recipe for the perfect disasterwhich can transform a spark into a weeks- or months-long blaze that consumes tens of thousands of acres. Another possible cause of forest fires is lightning. Bushfires and grassfires start due to natural and human causes.

All fire needs heat, oxygen and fuel (vegetation) to start, burn and keep burning. Learn more about what causes bushfires and how to prevent fires starting on this page. Learn about the natural and human causes of bushfires in Australia, the role of climate change, and how to prepare for and prevent them.

Explore the history and impact of some of the major bushfire events in Australia, such as the Black Thursday, Ash Wednesday, Black Saturday and Black Summer Bushfires. There are two main buckets to categorize how a wildfire starts: natural and human caused. Lightning is the primary agent for naturally caused fires.

(There are some instances of volcanic activity starting wildfires, but that is limited.) How wildfires start and spread depends on fuel, wind, and heat. Learn the science behind wildfire causes, rapid fire behavior, and why fires escalate so fast.

There are lots of possible bushfire causes. They can start naturally, when lightning strikes and ignites dry plants and trees. But they can also be caused by people for example, by someone not extinguishing their campfire properly.

Sadly, sometimes fires are started deliberately, too. How do Wildfires Start and Spread? Wildfires can start and spread quickly, as fast as 14mph. Learn more about how and why this happens with guidance from the Western Fire Chiefs Association (WFCA).

Bushfires can originate from both human activity and natural causes with lightning the predominant natural source, accounting for about half of all ignitions in Australia. Lightning strikes are undoubtedly the leading cause of naturally ignited wildfires, especially in drier climates and during periods of prolonged drought. There are two main types of lightning strikes that cause fires: Cloud-to-ground lightning: This is the most common type associated with ignition.

Forest fires, also known as wildfires or bushfires, are uncontrolled blazes occurring in natural settings like forests, grasslands, or shrublands. These fires can consume vast areas of vegetation, spreading rapidly based on environmental conditions such as wind and topography.