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Bush fire aware logo

Understand Bush Fire Behaviour

fire behaviour contributors

Our bushland has adapted to live with bush fire. Let’s do the same… Understanding how bush fires work is important when it comes to protecting life and property.

Bush fire behaviour is determined by bush fire fuel (vegetation), terrain, weather, and ignition.

Fuel (vegetation)

Different types of bush fire fuels burn differently: finer fuels like grasses burn more quickly and erratically, while more substantial, woodier fuels found in forests burn with greater intensity.

Much of Hornsby Shire has large areas of woody vegetation, which have supported large fires in rural, residential, and urban areas the past.

Terrain (landscape)

Fires burn faster uphill and can build in intensity and speed. With every 10 degree increase in slope, a fire will double its rate of spread; making ridge tops the riskiest place to live. Most of Hornsby’s urban development is located in these areas.

Weather

Bush fires are influenced by ‘fire weather’ – a combination of strong winds, low humidity and high temperatures. Within the Hornsby LGA this weather occurs generally over Spring and Summer and is characterised by hot dry north-westerly winds and southerly busters that can cause a fire to spread quickly from bushland areas, threatening homes, businesses and infrastructure.

Depending on weather conditions, embers, generated by burning leaves, branches and bark can be transported by wind from one location to another, causing new fires or spotting and speeding the progression of the fire front. Embers can land several kilometers ahead of the main fire front on catastrophic fire danger days.

Avoid Being Caught Out by Fire

You must Plan, Prepare, and Stay Informed to stay safe from bush fires.

Living in the 'bushland shire' means living bush fire ready

Do these now

orange tick icon Prepare a Bush Fire Survival Plan at myfireplan.com.au (5 minutes). It could save your life and the life of those you love.
orange tick iconDownload the Hazards Near Me app on your phone.
orange tick icon Prepare your home. A well-prepared home can be easier for you or fire fighters to defend; Is more likely to survive, even if you're not there; Is less likely to put your neighbours' homes at risk; Will give you more protection if a fire threatens suddenly, you cannot leave and need to take shelter.
orange tick icon Pack an Emergency Survival Kit that contains essential items and important documents regardless of whether you plan to stay and defend or leave early. Visit rfs.nsw.gov.au to learn what to pack.
orange tick icon Set aside protective non-synthetic clothing for each member of your family (long sleeved shirt, long pants, sturdy footwear, goggles and P2 mask).
orange tick icon Plan for your animals and livestock to prevent undue stress.
orange tick icon Check that your home and contents insurance is up-to-date.

If you are infirm, disabled or elderly you may be eligible for the AIDER Program to assist you with your property preparation. Visit the AIDER page at rfs.nsw.gov.au.

Flame, heat and embers can all cause timbers and other combustible elements to ignite and windows to break. There are ways to prevent the transfer of flame and heat from your yard to your home and seal gaps to stop embers from entering.

Click on the image below to find out how to prepare your property all year round.

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Download the Bush Fire Aware brochure (PDF 5.5MB)

Fire danger ratingDon't assume you will receive a warning as fire approaches

It's up to you to monitor conditions, know what the Fire Danger Rating is each day, look our for warning messages and stay connected to local media, radio stations and websites.


NSW RFS logoNSW Rural Fire Service

rfs.nsw.gov.au
Bush Fire Information Line 1800 679 737
NSW RFS Hornsby/Ku-ring-gai District 9883 2000


Hazards Near Me iconHazards Near Me App

Current information about local bush fires, floods and tsunamis, fire danger ratings and hazard reductions.


Live Traffic iconTraffic and Travel Information

livetraffic.com
Traffic Enquiries 132 701


BOM iconBureau of Meterology

bom.gov.au


ABC Radio iconABC Radio

AM radio 702


DPI IconDepartment of Primary Industries

dpi.nsw.gov.au/emergencies/emergency


Hornsby Shire Council logo in black and whiteHornsby Shire Council

hornsby.nsw.gov.au
9847 6666


IN AN EMERGENCY

Call Triple Zero (000) and ask for Police, Fire or Ambulance. If you are hearing or speech impared call 106.