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Thunderstorm asthma information in your language
Thunderstorm asthma can affect people with asthma or hay fever, particularly during Victoria's grass pollen season from October to December.
It occurs when high levels of grass pollen combine with specific thunderstorms, causing pollen grains to release tiny particles carried by wind gusts. These particles can be inhaled deeply into the lungs, quickly triggering asthma symptoms, even in those without a history of asthma. When many people experience symptoms simultaneously, it is called epidemic thunderstorm asthma.
More information about epic thunderstorm asthma is available on the Better Health .
- Organisation:
- Victorian Department of Health
- Target audience:
- General
- Service area:
- VIC
- Published:
- October 2025
- Last reviewed:
- October 2025
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