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As Australia heads into summer with an El Niño, it’s important to understand and prepare for the health risks associated with extreme weather.

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Research led by UNSW and Sydney Water shows that western Sydney's summer temperatures can be significantly reduced and mortality rates halved by combining water technology, cool materials and greenery.

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With Sydney’s temperatures rising today UNSW has two urban heat experts available for comment.

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The Australian Open has shown the world there is a temperature at which tennis players start to hallucinate about Snoopy. In a warming world, Donna Green asks: how hot is too hot?