Cyclone Alfred and the danger of Floodwaters
Cyclone Alfred and the danger of Floodwaters
In early March 2025, ex-Tropical Cyclone Alfred unleashed unprecedented rainfall across southeast Queensland, with Brisbane experiencing its wettest day in over half a century. The deluge led to widespread flooding, causing significant disruptions and highlighting the critical dangers associated with driving through floodwaters.
Cyclone Alfred's Impact on Brisbane
Cyclone Alfred made landfall around Bribie Island, north of Brisbane, bringing with it torrential rains and severe weather conditions. The storm's aftermath saw rainfall totals exceeding 400mm in some areas, marking Alfred as the first cyclone in more than 50 years to hit Queensland's southeast. Brisbane's central business district recorded over 260mm of rain since 9 am on Sunday, with a remarkable 45mm falling within a single hour during a late-night downpour. This relentless rainfall led to the closure of numerous roads, widespread power outages affecting approximately 240,000 homes and businesses, and the activation of emergency services to assist residents in the inundated regions.
The Dangers of Driving Through Floodwaters
Driving through floodwaters poses severe risks to both individuals and their vehicles. Key dangers include:
- Vehicle Buoyancy and Loss of Control: As little as 15 cm of fast-moving water can destabilize a vehicle, leading to loss of control. At depths of 30 cm, many vehicles, including SUVs and trucks, can be swept away.
- Engine and Electrical System Damage: Water ingress can cause engines to stall and lead to irreparable damage if attempts are made to restart the vehicle. Additionally, water can infiltrate electrical systems, resulting in shorts and malfunctions.
- Hidden Hazards: Floodwaters often conceal dangers such as debris, displaced maintenance hole covers, and uneven road surfaces, increasing the risk of accidents.
- Health Risks: Floodwaters can be contaminated with hazardous substances, posing health risks upon contact.
Safety Recommendations
To ensure safety during flood conditions:
- Avoid Flooded Areas: Do not attempt to drive through flooded roads. Instead, seek alternative routes or delay travel until conditions improve.
- Heed Warnings: Always follow road closure signs and barricades; they are placed for your protection.
- Stay Informed: Monitor weather updates and advisories from reliable sources to stay aware of current conditions.
By understanding the profound dangers of driving through floodwaters and adhering to safety guidelines, we can prevent tragedies and ensure the well-being of all during such extreme weather events.