The Bureau of Meteorology has forecast a top of 35 degrees in the late afternoon today with temperatures set to soar into the 40s across much of the state on Monday before a cool change arrives in the evening.

US President Joe Biden placed climate action among his top priorities on taking office. Most analysts expect Australia’s relative inaction to get more attention.

Heritage NSW has blasted the Berejiklian government’s preparations for raising the Warragamba Dam wall, saying consultation with traditional owners was inadequate and modelling was needed to determine the likely impacts to cultural heritage from inundation.

State-owned Forestry Corporation says last summer's record bushfires scorched half of the native forest estate and a quarter of its softwood plantations, setting the agency on track for a sharp drop in revenue in coming years.

Blistering heat from inland Australia will sweep towards the NSW coast in coming days, prompting health authorities to warn the public to take "necessary precautions" to avoid heat-related illnesses. 

With governments around the world declaring hydrogen to be central to the future, an Australian firm is developing the first domestic hydrogen products.

The cost of NSW's biggest dam project could blow out to $2.1 billion, or more than triple the original estimate, delivering what is likely to be the most expensive water in the Murray-Darling Basin.

In an open letter to the Berejiklian government, the association says TransGrid should have detailed other options in its EIS to the building of two giant overhead transmission lines.

The Bureau of Meteorology is forecasting a severe heatwave to set in over Friday to Sunday with extreme conditions expected in some areas along the NSW coast.

Hundreds of forestry jobs are at "imminent" risk because of the lack of available timber following last summer's bushfires, the state-owned logging company warned in a letter to the environmental watchdog.