Heatwave events

Key Finding

Since 1958, there has been an observable increase in the occurrence rates of all heatwave severities. In the 30 years between 1986 to 2015, in-excess of 80% of Queensland has experienced an average of 3 heatwave events per year.

• The rate of increase in heatwave occurrence has been greater in the south-west and central parts of Queensland.
• Severe and extreme heatwaves have been observed more often across large parts of Queensland over the past 70 years.

A heatwave, as described by the Bureau of Meteorology (BoM), is “3 days or more of high maximum and minimum temperatures that are unusual for that location”.

Most heatwaves in Australia and Queensland are of low intensity, with most people expected to be able to cope.

Less frequent, higher intensity heatwaves, that are classified as severe, can be challenging for older people (aged over 65 years), pregnant women, babies and young children, and those with a chronic illness.

Rarer, exceptionally intense heatwaves, classed as extreme, can impact on infrastructure such as power and transport.

Predictions suggest a widespread increase in the frequency, duration and intensity of all heatwave severities throughout the rest of the 21^st century.

More information:

• The State Heatwave Risk Assessment
• Queensland Future Climate Dashboard
• Queensland future climate: Heatwave case study

Relevant Sustainable Development Goals’ targets

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