Flood water facts. Did you know?

Flood water facts. Did you know?

Floodwater facts

  • The majority of drowning deaths in the world occur within only 3m of a safe point.
  • 2/3 of those who die in flood-related accidents are considered to be good swimmers.
  • 32% of flood-related deaths are by drowning in a vehicle.
  • After 20 minutes in water at 12C the temperature of the deep muscle of your forearm would drop from 37 ºC to 27ºC, leading to a 30% reduction in muscle strength.
  • In water 1m deep (waist high), flows of 1m/s become challenging and by 1.8m/s (4mph) everyone will be washed off their feet.
  • If the speed of the flood water doubles the force it exerts on you/your car is quadrupled.
  • Just 15cm (6 inches) of fast flowing water can knock you off your feet and be enough for you to be unable to regain your footing.
  • 60cm (2 ft) of standing water will float your car.
  • Just 30cm (1ft) of flowing water could be enough to move the average family car.
  • Just an egg cupful of water in the combustion chamber could be enough to wreck an engine.
    Flood water can be contaminated and carry diseases.
  • Culverts are dangerous when flooded – the siphon effect of culverts can drag in pets, children and even fully grown adults.
  • African safari-type vehicles, with a roof-height snorkel for the engine air intake, can withstand deep water. But most regular vehicles risk extensive damage if water is sucked into the engine.
  • The water may be hiding a sinkhole, debris or a washed-out road ? all of which could halt your progress mid-way.
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