An ACT Government Website

Heatwave

Learn what a heatwave is and how to prepare for, manage, and recover.

By 2050, the ACT will experience an additional five hot days (days over 35˚C) each year. Some years may have an additional 20 days.

What is a heatwave

A heatwave is when the maximum and minimum temperatures are unusually hot over three days.

Heatwaves occur because of climate influences. These control how often heatwaves happen and how bad they are when they do.

Cities are more exposed to heatwaves. Buildings, roads, and dark surfaces absorb and trap heat.

Impacts and effects

Heatwaves can cause:

  • poor air and water quality
  • food and medicines to become unsafe
  • mental health illness
  • a rise in the demand for emergency, medical and wellbeing services
  • disruptions to services such as power, businesses, schools, and public transport
  • the economy to decline because of these impacts.

Who is most at risk

Some people are more at risk than others, such as:

  • young children
  • pregnant and breastfeeding women
  • older people
  • people with chronic illness or complex health concerns
  • outdoor workers
  • people who will have difficulty reducing their exposure.

Read more about who is most at risk during a heatwave.

Before a heatwave

Be informed

Talk to your doctor about how heatwaves might affect you.

Reduce your risk

Take these steps before a heatwave to reduce your risk:

Remain aware

Stay informed by:

During a heatwave

Stay informed

On hot days, ACT Government social media channels will post advice for staying safe. Heat can impact you before a heatwave sets in and increase the risk when a heatwave occurs. Follow advice on hot days, before a heatwave happens.

High fire danger days as well as reduced air and water quality are also a risk during heatwave conditions. Monitor for:

Stay in contact

Check in with neighbours, friends and loved ones. Reach out to your list of contacts if you need assistance.

If you or someone you know becomes unwell:

If you or someone in your care becomes very unwell due to heat-related illness:

  • go to the nearest hospital emergency department
  • call triple zero (000) for an ambulance.
Stay safe

Stay safe in a heatwave:

  • Watch for signs of heat-related illness and seek medical support if required.
  • Drink enough water. Healthdirect have tips for keeping children hydrated during hot weather.
  • During the hottest times of the day, stay inside and close your doors, windows, blinds and curtains. Use fans or air conditioners if you have them.
  • Move to a cool refuge with air-conditioning. Like a public library or shopping centre.
  • Make sure animals have a cool place to rest and access to water. Do not exercise animals during the day.
  • Avoid working outdoors in the peak heat of the day, if you can. If you have to be outside, stay sun safe and follow safe working practices during hot conditions.
  • Check water quality before swimming in lakes and ponds. Hot weather encourages blue-green algae to bloom.
  • Monitor food safety. Food can quickly become unsafe during warm weather.

After a heatwave

Identify the impacts

After the heatwave has passed, continue to:

  • Check on neighbours, friends and loved ones. Reach out to your list of contacts if you need assistance.
  • Monitor for signs of heat-related illness and seek medical support if you are worried about yourself or someone else.
Manage ongoing risks

Continue to reduce the risks and stay safe:

  • drink enough water and remain hydrated
  • open your windows and doors to let the warm air out and the cooler air in
  • monitor for health alerts about air and water quality.
Assess and plan

Consider what worked, what didn’t work and what you might do differently next time.

Related information