We may also open our cooler places on a single day when the temperature is very high.
Cooler places are air-conditioned. They give public housing renters and residents relief from the hot weather. Cooler places help older and vulnerable people deal with the heat.
Heatwaves are 3 or more days in a row when the highest and lowest temperatures are unusually high.
See if the Bureau of Meteorology has issued a heatwave warning.
Find a cooler place by contacting your local office.
Read about the Department of Health's heat health warnings.