Many residents near Mount Sylvia and Junction View in southern Queensland's Lockyer Valley are stranded after floodwaters caused widespread damage in the area.
Vanessa Redinger from the Mount Sylvia/Junction View coordination committee says farming land, roads, powerlines and phone infrastructure has been washed away.
She says the area has not seen anything like it.
"Our family are fifth-generation farmers and this would have to be the worst disaster that's been seen [in] lifetimes of our family," she said.
"Certainly by far the damage here done is worse than ... 2011, worse than '74 and '59.
"The creeks there have just taken their own new path. We've lost 30 to 40 acres of cultivation."
© ABC 2013
10:32 EDT A two-year-old boy has died and a girl has suffered serious injuries after a tree fell on their house at The Patch in the Dandenong Ranges, east of Melbourne, as severe thunderstorms swept through Victoria last night.