Australia and New Zealand's cricketers will wear black armbands in tribute to those affected by widespread bushfires in Australia when the teams meet in Friday's third Test in Sydney.
At least 18 people have died in blazes across the country.
There will also be a minute's applause to honour the country's firefighters.
"We pray conditions improve, the fires ease and the rains come," said Australia coach Justin Langer and captain Tim Paine in a joint letter.
"And, above all else, we hope all Australians pull together and help each other through this incredibly difficult time.