Hello from beautiful, sunny Sydney, where the morning's rainfall managed to drop the equivalent of November's average monthly rainfall in just two hours. The torrential rain has managed to flood roads, bridges and houses, and has shut down much of Sydney's public transport network. Here's what the rain has done to Sydney and its surrounds.

A low pressure system is building in Australia and is set to dump two months' worth of rain on Sydney and surrounds in less than a day. As if this wasn't enough, the area is set to be buffeted by intense and dangerous winds for the second time in as many weeks, and flash flooding is expected in some areas. Here's what you need to know if you live in NSW.

A number of unique weather conditions have combined today, resulting in a thunderstorm asthma warning being issued to Melburnians. Factors such as high winds, high pollen counts and impending thunderstorms can lead to potentially fatal symptoms for people with hayfever and allergies. Here's what you need to know, and what you should do if you're at risk.

Hurricane Florence is expected to make landfall along the US Atlantic coast tonight or tomorrow. While coastal Virginia, North Carolina and South Carolina are expected to be the hardest hit, anyone who lives along the US Eastern seaboard should be keeping a close eye on the storm’s progress.

The National Hurricane Center expects Hurricane Florence to cause “life-threatening, catastrophic flash flooding” when it makes landfall in the US later this week, and now there’s a tool that gives us an idea of just how catastrophic that impact will be.

A geomagnetic storm has been forecast to hit Earth this week, due to high speed solar wind streams resulting from a coronal hole. This all sounds very scary, and media coverage of the event has ranged from apocalyptic to promising a planet bathed in beautiful auroras, but the truth is a little less spectacular than that.

Most of us won't actually notice the solar storm's activity at all - but if you're lucky you may get a glimpse of an aurora.

Super hurricane Irma is causing a ton of cruise and flight cancellations in addition to delays and course changes. But your travel insurance should cover all that, right? Maybe. Maybe not.

The Earth is getting warmer. That's a fact. And as the Earth gets warmer, we expect to see larger and stronger hurricanes. Also a fact. But there are folks denying these facts, even to the point of blaming the liberal media for the fact that hurricanes are in the news.

People who live in areas where it snows may be aware at just how terrible snow forecasts tend to be. That's because snow is especially difficult to predict.

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The Bureau of Meteorology has issued a severe thunderstorm warning with the possibility of flash flooding and damaging winds for the Hunter, Metropolitan, Illawarra, Central Tablelands, Southern Tablelands and parts of the South Coast, North West Slopes and Plains, Central West Slopes and Plains, South West Slopes and Australian Capital Territory forecast districts. Heavy rains and a potential storm are also expected to hit Sydney's CBD this afternoon. Here are the details.

A fourth death has been attributed to Melbourne’s “thunderstorm asthma” emergency on Monday night, and it was lucky there were not more, according to the state’s health minister. More than 2000 people suffered breathing problems when a severe storm combined with an extreme pollen count to cause what is being described as “thunderstorm asthma”.

If you suffer from itchy eyes, a runny nose, headaches and excessive sneezing this time of year, you’re certainly not alone. Hay fever or allergic rhinitis is an allergic reaction to pollen and affects one in six Australians. But when you combine high pollen counts with thunderstorms and warm weather, a much more serious phenomenon can unfold: thunderstorm asthma attacks.

It's no fun to lose power for hours or days, especially if you end up having to throw out the food in your fridge. If you know a big storm is coming, you can keep food safe longer by filling your freezer with jugs of water.