Christchurch Civil Defence says that liquefaction, rockfall and water supply are the main areas of concern following yesterday's cluster of aftershocks in Christchurch.
Large deposits of liquefaction have been identified in a number of areas, and Pegasus Avenue and Branksome Place have suffered major liquefaction and sewage leaks.
Civil Defence is reminding people to stay away from the Port Hills unless they live there, or need to be there.
Following the quakes there was significant rockfall, and Civil Defence says it remains a potential hazard in hill areas.
Lines company Orion says that there are now only about 100 houses with no power.
There are no specific areas affected, but scattered properties around the city.
The company says they expect most of the remaining households will have power restored this morning.
Christchurch Mayor Bob Parker says he is delighted that many of the city's malls intend to open today.
"It is very important we bounce back. For retailers it is one of the biggest trading days of the year and they need to open."
However the Palms says it will remain closed as structural engineers are continuing to assess the building to ensure that it is safe prior to reopening.
The mall says that the safety and wellbeing of retailers, staff and customers is the main priority.
Jason Marsden, centre manager at the Hub Hornby (Mall) says the centre is open, "Engineers were onsite within minutes of the first event, and the Centre has been given the all clear.
"Pak'n Save and the Pharmacy are trading as well as several stores and the Mall expects all stores to be trading on Christmas Eve," said Marsden.
Riccarton Mall and the Cashel Mall will be open today, and Christchchurch city council says that the Palms Mall in Shirley is the only mall that is shut today.
Foodstuffs have confirmed that their supply chain is intact, and are encouraging customers to continue to purchase normally as essential supplies of food and water will remain available in all of our stores.
The majority of their stores are open, though three - Kaiapoi New World, Stanmore New World, Wainoni Pak n Save - will open later this morning.
However Countdown says that yesterday's tremors have disrupted operations. A number of their stores will be closed today, and online shopping is not operating.
Open Countdown stores are Hornby, Rangiora, Rolleston, Colombo St, Church Corner, Kaiapoi and Avonhead.
Several SuperValue and Fresh Choice supermarkets will be open for grocery shopping, including stores at Lincoln Road, Wairakei Road, Sumner, Fendalton and Barrington.
Civil Defence say that all water and wastewater pump stations have power and are operative. Most houses should have water supply, except for those in the Sumner area due to a break in the water supply at the causeway overnight. Crews are now working to restore the water supply to Sumner and it is expected this will be restored by 10am, or water made available from tankers.
Tankers will be deployed to areas without water supply as
necessary. Water pressure is being maintained, and there is no need
to boil water.
Ten water crews, 15 wastewater crews and 21 jetting crews and subcontractors are ready to start repairs and clear silt from roads and sewers across the city.
Large deposits of liquefaction have been identified in the
- Bexley, in the area between the Avon River and Anzac Drive, and around Horseshoe Lake
- Drake Street, Sinclair Street and Brighton Road
- Waygreen Avenue, Terrelle Street, Willryan and Rebecca avenues
- Belair Close, Vivian Street, Rockwood Avenue, Tedder Avenue and Endeavour Street
- Pinewood, Flemington, Ascot and Bower avenues, and
- Crofts Lane.