Impacts and Responses to Wildfires (AQA A Level Geography)

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Rhiannon Molyneux

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Primary & Secondary Impacts of Wildfires

  • Primary effects are the immediate and short-term impacts of wildfires
  • Secondary effects are the impacts that occur later on after the wildfire has been extinguished

Primary and Secondary Impacts of Wildfires

 

Primary impacts

Secondary impacts

Social

Deaths and injuries

Displacement of people

Damage to properties and infrastructure causing disruption to people’s lives

Damage / destruction of crops

 

Mental health issues e.g. stress, anxiety, depression

Health issues such as respiratory illness caused by smoke inhalation

Homelessness

Food shortages

Economic

Destruction of property and infrastructure leading to significant costs for repair and reconstruction

Disruption of trade and economic activity

Loss of crops and timber

Loss of income and employment

Costs of immediate responses

Slower economic growth and development

Increased economic inequality as impacts are more severe for most vulnerable people

Increased costs of insurance and hazard management strategies

Environmental

Destruction of habitats and ecosystems

Loss of biodiversity

Atmospheric pollution from smoke and toxic gases

Water pollution as ash gets into water

Long-term impacts of food webs and ecosystems

Increased soil erosion and leaching due to lack of trees and vegetation

Damage to soil and loss of soil fertility

Increased risk of flooding

Release of carbon emissions contributes to climate change

Political

Pressure on governments to co-ordinate emergency response

Changes in forest management policies to reduce chances of fire

Responding to Wildfires

Short- and long-term responses

Short-term Responses

Long-term Responses

Firefighters work to contain and extinguish the fire as soon as possible

Warnings and evacuation notices issued

Fire diverted away from settlements

Water sprayed onto land and buildings to reduce flammability

Search and rescue operations implemented

Monitoring of air quality to issue advisories about risk of respiratory illness

Public education campaigns to reduce chances of wildfires

Preparation and training of emergency services

Creating firebreaks in forested areas to reduce spread

Using less flammable materials in construction e.g. using more stone and brick rather than wood

Improvement of monitoring and warning systems

Restoration of damaged ecosystems

Preparedness and Adaptation

  • Preparedness and adaptation include making people more aware of hazards and taking action to minimise risk
    • Satellites and infrared sensors can be used to improve early detection and monitoring
    • Warnings can be issued to allow time for evacuation
    • Evacuation plans can be prepared and emergency services trained to improve response
    • People can prepare emergency kits to ensure they have essential items to hand
    • Education campaigns can inform people how to create defensible spaces around their homes

fire-smart-house

Strategies to reduce wildfire hazard

Mitigation and Prevention

  • Strategies can be implemented to reduce the chances of wildfires and extinguish them as quickly as possible
    • There are various strategies to extinguish wildfires and limit their spread
      • Firefighters often use helicopters and aeroplanes to drop water and fire retardants onto fires to reduce the intensity of the fire and slow its spread
      • Backburning is a strategy where firefighters light small fires ahead of a larger wildfire to reduce the amount of fuel available to help slow or stop the spread of the fire
    • Public awareness campaigns and rules on use of campfires and barbecues can reduce the chances of a wildfire starting
    • Weather can be monitored for conditions that cause high risk of fires (e.g. dry vegetation, strong winds, lightning storms)
      • Alerts and fire bans can then be implemented to residents urging extra caution
      • e.g. Red Flag Warnings and Fire Weather Watches are used to advise residents to act with caution in USA
    • Firebreaks can be used to reduce the chances of wildfires spreading by creating deliberate gaps in forested areas
    • Controlled burning can reduce the amount of fuel available
    • Improvement to infrastructure allows better access for emergency vehicles during wildfires
  • Land-use zoning can be used to reduce the amount of flammable material in areas at higher risk
  • Building codes can be implemented to ensure fire-resistant materials are used in construction and sprinkler systems are installed

Worked example

Case Study – Black Summer Bushfires, Australia

Background

  • The 2019-20 bushfire season began in September 2019 and ended in March 2020
  • It was one of most devastating wildfire seasons in Australian history
  • The fires burned over 20 million hectares of land and it is estimated that over 1 billion animals were killed

australia-2-1

Map to show location of Black Summer bushfires

Causes

  • 2019 was Australia’s driest and hottest year on record
  • Record-breaking temperatures combined with strong winds created perfect conditions for wildfires

australia-1

Graph showing mean temperature above or below average in Australia

  • Much of Australia’s forest is made up of eucalyptus trees which are highly flammable
  • Loss of traditional fire management strategies used by Aboriginal people has increased vulnerability
  • Some fires were lit deliberately, though others were caused by lightning strikes
  • Large bushfires can create their own storms which cause more lightning strikes

australia-3

How bushfires cause lightning storms

Primary and Secondary Impacts of the Black Summer Bushfires

 

Primary impacts

Secondary impacts

Social

33 people were killed directly

Approximately 80,000 people were displaced

Almost 6000 buildings were damaged or destroyed causing disruption to people’s lives

Health issues / injuries caused by exposure to smoke and ash

 

Almost 450 people died from snoke inhalation

Mental health issues e.g. stress, anxiety, depression

Health issues such as respiratory illness

 

Economic

Disruption to tourism, agriculture, forestry and other industries e.g. loss of tourism estimated to cost over $4 billion

Destruction of farms, crops and livestock estimated to cost around $5 billion

Cost of firefighting estimated at over $2 billion

 

Insurance companies paid out significant amounts for damages and losses leading to higher insurance premiums

Slow down in economic activity due to disruption to trade and industry reduced GDP growth

Cost for reconstruction of homes and infrastructure

Environmental

Destruction of habitats and ecosystems with an estimated 3 billion animals killed or displaced

e.g. on Kangaroo Island, almost half the population of koalas were killed

Smoke, ash and chemicals polluted the air, soil and water impacting ecosystems and biodiversity e.g. air quality in Sydney and Melbourne was hazardous

Release of over 400 million tonnes of carbon dioxide

Long-term impacts of food webs and ecosystems

Increased soil erosion and loss of soil fertility due to lack of trees and vegetation

Release of carbon emissions contributes to climate change

Smoke from the fires depleted the ozone layer by 3-5%

Smoke circulated around the world decreasing air quality in neighbouring countries

 

Political

International aid and support arrived with many countries sending firefighters and supplies to help tackle the fires

Government response was criticised for being too slow

Raised awareness of need to tackle climate change and improved disaster response

 

Government response was criticised for failing to address the root causes of the fires

The National Bushfire Recovery Agency was created to improve response to bushfires and help with the rehabilitation and reconstruction in affected communities

 

Short-and long-term responses

Short- and Long-term Responses to the Black Summer Bushfires

Short-term Responses

Long-term Responses

Around 80,000 firefighters from Australia and other countries such as New Zealand, Canada and USA tackled the fires

The Australian Defence Force provided support with around 6500 soldiers deployed

Temporary accommodation was set up in sports centres and community halls

The government paid out a Disaster Recovery Payment of $1000 per adult affected

Fundraising campaigns raised money for the response e.g. animal rescue groups such as the RSPCA and WWF raised almost $200 million for animal rescue and rehabilitation

Government committed over $2 billion to bushfire recovery and provided financial assistance to affected communities and businesses

Provision of mental health services for affected people

Development of a range of mitigation strategies e.g. the creation of the National Bushfire Recovery Agency to co-ordinate relief efforts and support reconstruction

Environmental restoration through initiatives such as the creation of a koala hospital and breeding programme

Policies to tackle climate change e.g. through a shift towards renewable energy

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Rhiannon Molyneux

Author: Rhiannon Molyneux

Rhiannon graduated from Oxford University with a BA in Geography before training as a teacher. She is enthusiastic about her subject and enjoys supporting students to reach their full potential. She has now been teaching for over 15 years, more recently specialising at A level. Rhiannon has many years of experience working as an examiner for GCSE, IGCSE and A level Geography, so she knows how to help students achieve exam success.