"Mate, I lost about 100 heartbeats I reckon in that split second, and got a few more grey hairs."

Canberrans can expect a cool change from Monday after a warm and windy weekend.

Canberra hasn't seen any heatwaves this summer, but that doesn't mean it hasn't been a hot one.

NSW will likely cop its third buffeting from an east coast low in five weeks but there is some good news.

The Bureau of Meteorology has warned of possible flash flooding in the Queanbeyan and Molonglo rivers on Friday.

Brisbane's sweaty masses are set for a slight reprieve leading into the weekend, with the high temperatures and sticky humidity both set to become that little more bearable.

If Thursday hits its predicted peak it will be the ACT's longest March heat spell on record.

There are more than 4000 uninhabitable homes across NSW as people begin to wonder what to do amid the mammoth clean-up effort.

Brisbane is in for a wet start to the week, with storms likely to hit the city on Monday and rain predicted for the following four days.

In a town regarded as one of the world's hottest, Marble Bar locals are still reminded to take care as the mercury hit 48 degrees Celsius on Monday.

Global temperature records continue to tumble, with August easily the hottest in 124 years of data, Japan's Meteorological Agency says.

Winter's grip will finally feel like it's loosened amid a "heat spike" this weekend - even if that season's squeeze was not a very tight one.

The Bureau of Meteorology has issued a severe thunderstorm warning for parts of Sydney.

Residents in north-eastern NSW advised not to travel as heavy rains from another east coast low lift flood risks all the way down to the Hunter.

Two major industry groups are asking the Australian and Queensland governments to financially support flood mitigation projects in the Greater Brisbane region that have been proven to work since the 2011 floods.

Thunderstorms have rumbled their way across Sydney for the ninth consecutive day, with more thunder and lightning on the horizon throughout Monday morning and into the afternoon.

Sydneysiders can expect several days of rain-soaked commutes after an early morning downpour ended three weeks of uninterrupted sunshine.

Sydney's run of balmy weather will take a break as a strong cold front brings a wintry chill to much of the state's south.

Canberrans still wringing themselves out from the wettest June on record shouldn't put away their gumboots just yet.

Temperatures are set to climb towards 40 degrees in coming days in Sydney's west with only cooling sea breezes likely to cap the mercury in the city.