Experts have warned of a “horrendous” couple of days of weather for eastern and southern Australia.

We’ll be copping highs of 34 the next couple of days and if you don’t have one already, you might wanna grab a fan because we’ll be sweltering through temps in the high 20s throughout the night as well.

Mercifully, cooler conditions will move in at about 4pm on Thursday, with the mercury set to drop from 32C to 19C in the space of a few hours.

Firefighters will be on high alert across the country with every capital city expected to swelter through 30+ degree days.