A man is fighting for his life after he and two others were pulled from the water at Sydney's Bondi Beach.
Emergency workers were called to the southern end of the beach just before 7.30pm on Wednesday.
Police said officers arrived to find members of the public performing CPR on a 21-year-old man.
Police were told two 20-year-old men he was swimming with were also rescued and have been released from hospital.
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The older man is in a critical condition in St Vincent's Hospital.
Emergency services have issued a warning to Sydneysiders to stay safe as the heat levels rise.
Scorching summer temperatures have seen some regions reaching close to 50C with records crumbling as the week long heatwave continues.
On Wednesday, in central NSW Ivanhoe got to 46.8C, while a sea breeze limited inner Sydney to 29C but western suburbs including Penrith recorded 39.7C.
