Parts of south-east Queensland and the northern New South Wales coast are expected to experience a low-severity heatwave this week, with temperatures forecast to peak on Wednesday.
According to the Bureau of Meteorology (BOM), by mid-week, temperatures will rise to 34 degrees Celsius in Brisbane, 37C in Ipswich and 32C in Coolangatta.
Lismore is expected to hit 34C on Wednesday, while coastal areas like Kingscliff are forecast to reach 32C.
BOM senior meteorologist Felim Hanniffy says the temperatures, while low-grade, are above average for this time of year.
"We'll see those temperatures well above average for a couple of days, particularly away from the coast and across more inland areas," he said.
"Around the coast you'll have the afternoon sea breeze kicking in.
"Through the middle and latter parts of the week, we'll probably see a little bit more in the way of cloud and an increasing chance of showers."
'Find a cool spot'
A low-intensity heatwave is not unusual during March as summer transitions into autumn, Mr Hanniffy says.
"[It'll be] a noticeable change from the fresh conditions we're seeing at the moment," he said.
"We'll see that brisk southerly wind ease as we go into early next, so that helps make those temperatures more noticeable."
The Queensland Ambulance Service (QAS) says it's important to take care in the heat.
"Anybody can be at risk of heat-related illness," a QAS spokesperson said.
"But infants, the elderly and people suffering from pre-existing medical conditions can be particularly vulnerable.
"It will be particularly important to drink plenty of fluids, preferably cool water, regularly throughout the day.
"If possible, find a cool spot to relax in a building with air-conditioning, or good airflow, and limit strenuous outdoor activity."
Brisbane's Michelle Churchett has come to the Gold Coast for the weekend but says she will be stuck at work when the heat hits.
"I guess I'll just have to run from work aircon to home aircon, quick smart. Hopefully, it doesn't break," she said.
For the less fortunate, like John from Tweed Heads who has been sleeping rough, there are fewer options to beat the heat.
"I'll just be on the street," he said.
"I know Agape [a homelessness outreach service], which I might be going to."
