TODAY is expected to be hottest day of the heatwave in Ipswich.

Temperatures will peak at a scorching 40C in the hottest part of the day and with humidity pushing 90%, it's going to feel a whole lot more uncomfortable.

The Bureau of Meteorology warns there is a medium chance of showers, most likely during this afternoon and evening. There is also the chance of a possibly severe gusty thunderstorm from late this morning.

Temperature will ease slightly to 38C on Thursday, 35C on Friday and cooling off to 33C on Saturday.

The city will continue to swelter through temperatures close to 10 degrees above average for at least another two days.

The city will be among the hottest parts of the state, with some cities in the west topping 40C, in what the Bureau of Meteorology is warning will be the most significant heat wave to impact the state this summer.

The chance of gusty afternoon thunderstorms and showers will persist until at least Saturday.

Ipswich residents will continue to swelter through hot weather today.
Ipswich residents will continue to swelter through hot weather today. BOM

BOM forecaster Annabelle Ford said the extreme heat conditions had been building for days and were worsened by high humidity.

"There is a really stagnate air mass and nothing is moving which allows heat to build up," Ms Ford said.

"The quite high humidity makes it feel even hotter."

She said a combination of heat and humidity along with a weak surface through increased instability which promoted storm development.



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