Temperature records have been broken in WA today as a searing air mass spread across the state’s north and west.

A high pressure system centered over the Great Australian Bight is causing a pool of hot air to intensify over northwestern Australia, with temperatures soaring more than 15ºC above average in some areas today.

Image: Modelled maximum temperatures on Wednesday, September 27, according to the ECMWF-HRES model.

As of 4pm AWST on Wednesday, September 27, temperatures in the state's north had reached as high as 41.7ºC at Mardie.

Geraldton’s running maximum of 39.0ºC by 4pm was its highest September temperature on record, easily beating the old record of 36.1ºC from 2010. This is an impressive record, with data at Geraldton dating back to 1907.

Perth also broke its September record on Wednesday. As of 4pm, the city had reached as high as 34.3ºC, beating its previous September record of 34.2ºC from 2014.