The Student Volunteer Army is mobilising to check on Christchurch residents worst affected by Monday's earthquakes.
The organisation says it will have a team of 140 volunteers knocking on doors in hard-hit eastern suburbs on Wednesday to check if people need any help.
The Volunteer Army and Farmy Army say they are waiting for roads to be cleared and flooding to subside so they can provide a full response to help residents bogged down in silt from liquefaction.
They say it seems just as extensive as after the 22 February quake.
The Farmy Army says it has plenty of farmers ready and willing to help out.