Why This Matters
- The warning directly affects millions of Victorians, particularly those with hay fever, asthma, or undiagnosed respiratory conditions
- A severe thunderstorm asthma event could overwhelm hospitals and emergency services, as occurred a decade ago
- The new forecasting system gives residents actionable information for the first time, potentially saving lives
Background
Thunderstorm asthma occurs when strong winds during storms sweep up large amounts of grass pollen grains, which then absorb moisture and burst into smaller particles. These tiny particles can be inhaled deep into the lungs, triggering severe asthma attacks even in people who have never been diagnosed with asthma. The 2016 event in Melbourne was the worst recorded globally, leading to 10 deaths and thousands of emergency calls within hours.
Key Perspectives
Health authorities: Emphasise that while weather and pollen levels cannot be controlled, exposure can be reduced through awareness, medication adherence, and staying indoors during high-risk periods. The new forecast system is a central part of this strategy.
At-risk residents: People with asthma, hay fever, or a history of allergic reactions should have their preventer medication accessible and monitor the VicEmergency forecasts daily to avoid being caught outside during a thunderstorm asthma event.
General public: Even those without a known respiratory condition may be vulnerable, as the 2016 event showed that many affected individuals had no prior asthma diagnosis. Awareness and preparation are recommended for everyone.
What to Watch
- The daily thunderstorm asthma risk ratings on the VicEmergency platform, particularly during spring storm activity
- Grass pollen counts across Victoria, which will indicate the potential severity of the season
- Any major thunderstorm forecast for Melbourne or other densely populated districts, which would trigger heightened response from health services