It's good to know Perth is okA water temperature buoy located...

It's good to know Perth is ok

A water temperature buoy located inside the Everglades National Park in the waters of Manatee Bay hit a high of 38.44C late Monday afternoon, US government data showed.

Other buoys nearby topped 38C and 32C.

Normal water temperatures for the area this time of year should be between 23C and 31C, according to the National Oceanic and Atmospheric Administration (NOAA), which published the findings from the National Data Buoy Center.

The readings add to previous warnings over Florida's warming waters in the southeastern United States as prolonged heat continued to bake other parts of the country.

The growing frequency and intensity of severe weather - both on land and in oceans - is symptomatic of global, human-driven climate change that is fuelling extremes, experts in the field say, with current heatwaves expected to persist through August.