THE AFL has invoked its extreme heat policy for Sunday afternoon's NAB Challenge match between Adelaide and West Coast at Unley Oval in Adelaide, reducing the quarters to 22 minutes and extending the breaks.
The mercury is expected to hit 36 degrees, with the match scheduled to start at 1:35pm ACDT.
The players will now have eight-minute breaks at quarter and three-quarter time and 25 minutes at half-time.
However the policy won't come into play for Friday night's NAB Challenge clash between Fremantle and Richmond in Mandurah, despite the temparature forecast to reach almost 30 degrees.
The Bureau of Meteorology has predicted a maximum temperature of 29 degrees in Mandurah, located 72km south of Perth.
The match is scheduled for 4:10pm AWST with the temperature set to peak just after the first bounce.