The suspension of the Australian Tennis Open in Melbourne following two days of soaring will cause severe disruption to in ad schedule of 32 singles matches as well as doubles.
The Australian Open extreme heat policy has been implemented," said a statement.
The roof on Rod Laver Arena and Hisense Arena will be closed at the end of the set. Play will be suspended at the end of the set on all outside courts until further notice.
Temperatures could go as high as 44C according to forecast and remain high on Friday.
More top news
Family of suicide bomber Jamal al Harith said he would never have turned to terror before he was held for two years in notorious US camp.
Life may have evolved on at least three planets in a newly discovered solar system just 39 light years from Earth, scientists believe.
President is 'planing to overturn' guidance ordering schools to allow trans students to use the toilets matching their gender identity.