More than $2.2 million has been paid out in emergency payments in Christchurch since the earthquake.
Social Development Minister, Paula Bennett said on Sunday that some 13,500 emergency grants had been made.
Work and Income had made phone contact with more than 18,000 people, given emergency help to eight of them and sent about 150 to welfare centres, she said.
Staff have been going door to door as well, to contact people without power or phones.
Some Work and Income service centres will open in Canterbury on Sunday for people requiring emergency assistance.
The offices in Riccarton (Riccarton Road), Hornby (Shands Road), Rangiora (corner of Good and Blake streets) and Ashburton (corner of Cass and Moore streets) were to open from 9am to 4pm.
ACC says it had received 760 claims by Sunday from people injured in the quake.
The Accident Compensation Corporation number for people who want assistance with earthquake injury claims is 0800 101 996.
New welfare centre opens
An additional welfare centre has opened to accommodate people displaced in the Christchurch earthquake.
Civil Defence says a welfare centre has opened at Windsor School on Burwood Road which can sleep up to 80 people.
Three other centres, at Burnside High School, Pioneer Recreation and Sport Centre and Rangiora Baptist Church, remain open.
Nine-year-old Daniel Coria was one of about 140 people who spent Saturday night at the Pioneer Receation and Sport Centre in Spreydon.
He said his family was staying there while trying to get a flight to Napier, and says it hasn't been too bad, and feels safe because there are so many people around.