The weekend weather forecast is in – and it’s wet and wild for much of Australia, including Sydney and Brisbane

Heavy rainfall expected to stretch from Queensland’s Sunshine Coast to the Victorian border, with the potential for isolated falls of up to 100mm

A wet and wild weekend is on the way for much of Australia, as heavy rain in Queensland moves east and a tropical low off the coast of Western Australia threatens to develop into a cyclone.

Sydney, Brisbane and Canberra can all expect a washout on Saturday, with heavy rainfall expected to stretch from Queensland’s Sunshine Coast down to the Victorian border, including the potential for isolated falls of up to 100mm.

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Stinging deaths, back yard poisons and billions spent: model predicts Australia’s fire ants future

Exclusive: Cost blow-out has experts worried people will use ‘huge’ volumes of pesticides to protect themselves from ‘tiny killers’

Australian households will spend $1.03bn every year to suppress fire ants and cover related medical and veterinary costs, with about 570,800 people needing medical attention and 30 likely deaths from the invasive pest’s stings, new modelling shows.

The Australia Institute research breaks down the impact of red imported fire ants (Rifa) by electorate, with the seats of Durack and O’Connor in Western Australia, Mayo in South Australia and Blair in Queensland the hardest hit if the ants become endemic.

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Blair: $1.7m in medical costs, $1.5m in vet costs and $5.1m in household pesticide costs.

Dickson: $1.4m in medical costs, $1.2m in vet costs and $4m in household pesticide costs.

Ryan: $1.5m in medical costs, $1.3m in vet costs and $3.4m in household pesticide costs.

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Controversial bill to protect Tasmanian salmon industry passes despite environmental concerns

Critics say industry threatens the endangered Maugean skate and laws were rushed through with ’no proper process’

Controversial legislation to protect the Tasmanian salmon industry has passed parliament after the government guillotined debate to bring on a vote in the Senate on Wednesday night.

Government and Coalition senators voted in favour of the bill, which was designed to bring an end to a formal reconsideration by the environment minister, Tanya Plibersek, into whether an expansion of fish farming in Macquarie Harbour in 2012 was properly approved.

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Queensland weather: towns cut off and roads closed as days of heavy rain forecast to continue

Slow-moving trough drags tropical moisture inland, dumping widespread heavy rain onto an already saturated landscape, Bureau of Meteorology says

Heavy rainfall has closed nearly 200 roads and cut off multiple towns in Queensland as already saturated rivers risk more flooding.

The Bureau of Meteorology issued a severe weather warning for heavy rainfall across normally dry inland areas of central west Queensland, including parts of the Northern Goldfields and Upper Flinders, North West, Channel Country, and Maranoa and Warrego districts.

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Glencore’s Hail Creek coalmine methane emissions could be higher than official reports – video

UN-backed research has found emissions of the potent greenhouse gas methane coming from Glencore’s Hail Creek coalmine are probably between three and eight times higher than officially reported. Two aircraft with different types of monitoring equipment and flying at different altitudes looked for plumes of methane coming from the coalmine in Queensland’s Bowen Basin – a site highlighted in a previous study as a major emitter. Glencore has challenged the results, saying in a statement it had ‘significant doubts’ about the research, claiming it used ‘out of date’ data

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