Cricket Australia is negotiating with authorities and England's board over travel conditions and whether players' families can come.
Australia Test captain Tim Paine was "devastated" to hear of Will Pucovski's latest concussion but has nominated Marcus Harris to step in should the opener prove unfit for the Ashes.
'The last few days we've really been able to galvanise around him, to have some really robust discussions on where we want to take this cricket team, what we expect of him and what he expects of us.'