Heatwaves

Heatwaves are perhaps our most under-rated natural hazard. In Australia during the 20th century, heatwaves caused more deaths than any other natural hazard.

What is a heatwave?

A heatwave is a prolonged period of 3 or more consecutive days of excessive heat. In Australia excessive heat can vary from 35°C to 42°C.

This unusual and uncomfortable hot weather can impact on human and animal health and cause disruption to community infrastructure such as power supply, public transport and services.

Who is vulnerable to the affects of a heatwave?

Although everyone is vulnerable to the affects of a heatwave, those most at risk are:

babies and children under four years
seniors and older people living alone
pregnant women, breast feeding mothers and infants
people taking medications that may interfere with the body’s ability to regulate temperature.

Anyone with:

a chronic or mental illness
health conditions that may impair sweating
limited or poor mobility
excess body weight (overweight)

People who undertake vigorous exercise during a heatwave (including animals) are also susceptible to its effects.

How do I avoid heat stress for myself and my family?

Wear lightweight, light-coloured, loose, porous natural fibre clothes
Avoid strenuous activities
Drink two to three litres of water per day, even if not thirsty
Avoid alcoholic, caffeinated or carbonated (soft) drinks
Don't take salt tablets unless prescribed by a doctor
Avoid protein foods such as meat, dairy products which increase body heat and fluid loss
Keep your home cool with curtains, shutters, or awnings on the sunny sides and open windows at night
If you don't have air conditioning, use fans, damp clothing and have frequent cool showers
Spend as much time as possible in air conditioned buildings (e.g. shopping centres, art galleries, libraries, museums)
Avoid direct sunlight. Wear a hat and sunscreen as sunburn limits your ability to cope with heat
If you work outside, keep hat and clothing damp
Don't leave children or pets in parked vehicles
If you suffer chronic illness or feel ill, see your doctor
Keep animals in the shade with plenty of water