
Austria has been experiencing an increase in the frequency and spread of forest fires. In 2021, the country faced its largest wildfire in recorded history, which grew to 100 hectares (247 acres) in Lower Austria. The dry conditions in the country, particularly in Lower Austria, have contributed to the spread of fires. Lightning is also a significant cause of forest fires in Austria, with approximately 15% of documented forest fires attributed to lightning strikes. The Institute of Silviculture at the BOKU University has been researching the occurrence, spread, causes, and characteristics of forest fires in Austria since 2008, providing valuable insights into this growing challenge.
| Characteristics | Values |
|---|---|
| Size of largest wildfire in Austria | 100 hectares (247 acres) |
| Number of fires analysed at the Institute of Silviculture at the BOKU University | 8,000 |
| Percentage of forest fires caused by lightning | 15% |
| Percentage of fires caused by lightning in the summer months | Nearly 40% |
| Number of litres of water dropped by the state fire brigade commander Dietmar Fahrafellner | 750,000 |
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What You'll Learn
- The largest wildfire in Austria's history occurred in 2021
- The causes of forest fires in Austria are analysed by the Institute of Silviculture at BOKU University
- Lightning is a major cause of forest fires in Austria
- Austria has experienced higher fire frequencies in the Alpine region
- The last time Austria was this dry was 35 years ago

The largest wildfire in Austria's history occurred in 2021
According to the state fire brigade commander Dietmar Fahrafellner, around 750,000 litres (198,000 gallons) of water were dropped on the Saturday. Hundreds of personnel were called in to help, including 500 helpers and two Canadair CL-415 air tankers based in Italy.
The fire was eventually contained to 115 hectares (284 acres). It was the largest wildfire in the country's recorded history.
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The causes of forest fires in Austria are analysed by the Institute of Silviculture at BOKU University
The occurrence, spread, causes and characteristics of forest fires in Austria have been analysed by the Institute of Silviculture at BOKU University as part of various research projects since 2008. The array stretches back over several decades and includes approximately 8,000 fires.
The research has shown that lightning is the major reason for forest fire ignition in Austria, besides human-caused fires. Fire records were compared with the real appearance of lightning events by using the Austrian Lightning Detection and Information System for the period from 1993 to 2010. It was found that 15% of documented forest fires were lightning-caused, with nearly all of these fires taking place during the summer months.
The research also found that almost 40% of all fires occurring from June to August were naturally caused. This is significant because it shows that while lightning is a major cause of forest fires in Austria, there are also other factors at play, such as human activity and dry conditions.
Indeed, in 2021, the state fire brigade commander Dietmar Fahrafellner noted that it had been extremely dry in the country, especially in Lower Austria, where the largest wildfire in the country's recorded history took place. This highlights how environmental conditions can contribute to the occurrence and spread of forest fires, in addition to lightning and human activity.
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Lightning is a major cause of forest fires in Austria
In October 2021, Austria experienced its largest wildfire on record. It started in Lower Austria, which had been suffering from an extreme drought, and quickly grew to 100 hectares (247 acres).
The occurrence, spread, causes and characteristics of forest fires in Austria have been analysed as part of various research projects since 2008. The array stretches back over several decades and includes approximately 8,000 fires.
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Austria has experienced higher fire frequencies in the Alpine region
The largest wildfire in Austria's recorded history occurred in October 2021. It started on 25 October in Lower Austria, which had been experiencing an extreme drought. The fire quickly grew to 100 hectares (247 acres) but has not spread much since then.
Lightning is the major reason for forest fire ignition in Austria, besides human-caused fires. In the period from 1993 to 2010, 15% of documented forest fires were lightning-caused. Nearly all lightning-caused fires were found during the summer months, whereas almost 40% of all fires occurring from June to August were naturally caused.
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The last time Austria was this dry was 35 years ago
In October 2021, a wildfire in Lower Austria grew to become the largest in the country's recorded history. It started on 25 October and quickly grew to 100 hectares (247 acres). It has been extremely dry in the country, especially in Lower Austria.
The state fire brigade commander Dietmar Fahrafellner said that around 750,000 litres (198,000 gallons) of water were dropped on the Saturday of the fire.
The past fire seasons in Austria have proven how widespread forest fires may occur. Fire frequency and areas burned have increased in recent years.
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Frequently asked questions
Wildfires in Austria have become more frequent in recent years.
Lightning is the major reason for forest fire ignition in Austria, causing 15% of documented forest fires. Human activity is another cause.
In 2021, a wildfire in Lower Austria grew to 100 hectares (247 acres) and became the largest in the country's recorded history.
Hundreds of personnel are often deployed to tackle wildfires in Austria. In 2021, around 750,000 litres (198,000 gallons) of water were dropped on a wildfire in Lower Austria.











































