The Rakaia Bridge in Canterbury is hammered by flood water. - Photo: RNZ /SUPPLIED
The torrential rain that has been causing chaos in the West Coast since yesterday, leading to the death of a woman in a swollen river, is forecast to continue for just a little while longer.
A weather warning has been extended until about now for Westland and 3pm this afternoon for Buller and Western Nelson as the front moves north.
About 60 dairy farmers are cut off due to road closures, meaning milk trucks have been unable to reach them and some will have to dump milk today.
Otago Civil Defence and Emergency Management says rockfalls have been reported on some Central Otago roads.
It said parts of the Clutha River were flooding, affecting Roxburgh and Clutha gorge trails.
A couple in the West Coast town of Hari Hari were facing a huge clean-up this afternoon after a creek ended up flowing right through the middle of their property yesterday.
It deposited a foot of silt and debri over their garden and inside their garage and ripped up their driveway.
The couple, Helen Clarkson and her husband, battled to divert as much of the water as possible away from their home using old tyres and pieces of wood.
"We went out and diverted the water that was coming through the garage towards the house. So we tried to stop any more from running under the house because it's built up silt and loosened piles."
Ms Clarkson said they were now waiting for the water to recede from around their house so they could begin the massive job of removing all of the silt and debri.
Earlier today, Westland Civil Defence spokesperson Andy Thompson told Morning Report the rain would remain heavy.
"We're still expecting some significant rainfall for the next couple of hours."
He said the road conditions around the regions are "still very suspect" and urged drivers to be very careful.
Contractors will be out on the roads to check the situation around the region.
However, he said there is slips, and potentially undercutting of roads.
"There are some local roads around the Hokitika and South Westland district that are still closed due to flooding, surface flooding, some streams burst their banks as well."
And he said: "Any travellers will just have to hold in place or head North."
"The emergency services did their job in the middle of the night and in some pretty trying conditions, did a pretty good job."
The has been minor flooding in areas including Kaniere, but the Hokitika River has held and water levels are falling, he said.
MetService said the rain has now eased at Haast, south of the glaciers, and the weather front is moving north.
It said rain is beginning to turn to snow in the Canterbury High Country.
Ten to 20cm of snow is expected above 800m, south of Arthur's Pass.
Road snow warnings are in place from Arthur's Pass to Wanaka.
There is concern that when the snow melts, it will add more water to already full rivers.
The Waimakariri River is in flood and has inundated a Fulton Hogan yard north of Christchurch.
However the regional council says its stop banks are not in danger of being breached.
South Westland Area School in Hokitika remains closed due to road closures and slips in the region.
And Westland High School are advising students that if they're unable to make it to NCEA exams because of the weather conditions, that they should ring the school.
Roading engineers will also be on the ground assessing the damage.
Ivory Glacier in the West Coast Region has recorded a massive 507.5 mm of rain over the past 2 days.— NIWA Weather (@NiwaWeather) November 8, 2018
That's 85% of Christchurch's annual normal rainfall! pic.twitter.com/F43HfHEqOI
State Highway 6 is closed between Hokitika and Fox Glacier, while State Highway 73 is blocked at Otira due to a major washout just before Goat Creek Bridge in Arthur's Pass.
It's expected SH73 could be closed for days or weeks in order to repair the bridge and motorists are being urged to use the Lewis Pass to get between Christchurch and the West Coast.
The flooding which had blocked SH6 stranded hundreds of tourists in Franz Josef overnight and the town remained cut off to the north and the south.
River levels on the West Coast are very high and the authorities are continuing to monitor water levels closely.
A group of 26 students and three staff from Otago Boys' High School who were forced to spend the night in a hut in Mt Aspiring National Park, after being cut off by floodwaters are expected to walk out today.
They are reportedly safe and have plenty of supplies.
Major roads affected
• SH 1 Ashburton - Caution Flooding - Near the intersection with Walnut Avenue. Road users are advised to take extra care.
• SH 73 - Springfield to Arthurs Pass - Caution - Flooding - Due to heavy rainfall there is flooding in the Mingha Bluff area. Manual traffic control or traffic signals will be required as the road is down to one lane.
• SH 73 Otira to Jacksons - ROAD CLOSED - Slip - Road closed due to surface flooding, washouts and slips.
• SH 6 Hokitikai to Fox Glacier - ROAD CLOSED - Surface Water - Road closed due to surface flooding, slips and washouts. .
• SH 7 Reefton to greymouth - Caution - Flooding - Flooding at Stillwater Underpass. Take care and slow down.
• SH 73 Otira to Kumara Junction - Road Closed - the approach to Goat Creek Bridge has been washed out. There is no vehicle access until further notice. An assessment of the damage will be carried out on Friday 9th November. Detour route: SH1 (Christchurch to Waipara), SH7 (Waipara to Greymouth), SH6 (Greymouth to Kumara Junction)
• SH 90 Tapanui to McNab SH 1 Junction (Willowbank) - Caution - Flooding - Due to surface flooding near Waikaka Rd intersection, there is a temporary speed restriction of 30 km/h in place. Road users are advised to take extra care.