The northwest is set to experience the hottest weather, with temperatures set to hit highs of between 30 to 40 degrees each day starting today through to Easter Monday.
Sydney has experienced a chilly start of the week after a southerly current arrived in town on Sunday ahead of the forecast week long of falls over the city.
Residents of and near communities between Giralia and De Grey, and those in Karratha, Port Hedland, Onslow and Dampier have been asked to prepare emergency kits that should include food, water, first aid supplies, portable radio, a torch, and spare batteries.
Severe thunderstorms also caused damage in southeast Queensland, as rooftops got ripped off and thrown miles away as thousands of residents went without electricity.
The super storms and wet weather conditions are set to linger on till Wednesday morning, with huge swells gulping up beaches including the popular Main Beach on Byron Bay.
Most of the buildings plunged into darkness were mostly in the Moreton Bay and the Sunshine Coast regions.
The towns of Woodford and D’Aguilar situated within the Moreton Bay area are some of the worst hit regions so far, with large hailstones damaging homes, properties and trees and branches.
When the system hits tropical cyclone strength, it will become the first tropical cyclone of the 2020/21 season, acquiring the name Imogen.
Penrith is scorching with the hottest day in the western parts of the city
Temperatures similar to those of summer and heightened fire dangers are also predicted in most parts of Victoria and South Australia today.