Thunderstorm and flash flood warning worsens Wellington's weather woes – Stuff.co.nz

Heavy rain has eased in the Wellington region, but wet weather overnight has closed roads and restricted access in some areas – and a thunderstorm could bring flash flooding on Wednesday afternoon and evening.
MetService New Zealand issued a severe thunderstorm watch for Whanganui to Wellington and Wairarapa, including the Tararua District, for Wednesday until 8 pm.
Thunderstorms bringing downpours with rainfall rates of 25-40mm an hour could cause flooding, especially about low-lying areas and could also lead to slips in affected areas, the warning said.
All train services on the Johnsonville line were suspended on Wednesday morning after a slip between Awarua St and Simla Cres. In a statement, Metlink said buses were replacing trains and would run to timetable.
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Paekākāriki Hill Rd was closed in both directions due to fallen trees and a slip that happened shortly after 8pm on Tuesday night.
State Highway 56 Opiki, Horowhenua remained closed between Tane Rd and the intersection with State Highway 57. Motorists were advised to detour via SH57.
Mangaone North Rd in Waikanae was restricted to residents only due to slips and a fallen tree.
Rahui Rd in Ōtaki was also open to residents and emergency services only due to a slip and surface flooding has been reported on Te Horo Beach Rd.
Nikau Palm Rd, Paraparaumu, was reduced to one lane and Waterfall/Emerald Glen Rd is only partially open due to flooding.
Akatarawa Road is open, but motorists should be cautious due to small slips in the area.
Grays Rd near Plimmerton remained closed due to flooding and a single vehicle crash on Paremata Rd was adding to congestion shortly after 6am. There were no injuries in the crash and contractors were assisting with traffic control. A tow had been called to the scene about 6.15am.
By the 14th day of summer, Wellington had recorded 173mm of rain compared to an average of 83mm in the entire month.
Heavy rain warnings remained in place for other regions in the North and South Island.
The Coromandel, Bay of Plenty, Gisborne from Tokomaru Bay northwards, Tasman and west of Motueka, Eastern Marlborough south of Blenheim and Canterbury Plains north of Ashburton, including the foothills and Christchurch all had Heavey rain warnings in place during Wednesday.
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