NEW : The official death toll in Queensland stands at 18 , police say . `` We have massive infrastructure damage that will take months and in some cases years to fully repair , '' Queensland Premier Anna Bligh told reporters . Two people are still missing in the northeastern state . Police urge people to knock on neighbors ' doors . A woman and her two children are among those who arrive .
NEW : The official death toll in Queensland stands at 18 , police say . Two people are still missing in the northeastern state . Police urge people to knock on neighbors ' doors . A woman and her two children are among those who arrive .