Two people flown to Hawke's Bay Hospital after a serious crash on State Highway 2 near Mohaka are in a stable condition.
The 6.16am crash involving a light truck was the first of two serious accidents in the region which closed parts of SH2 on Monday morning.
A man in his 30s and a male teenager were taken to taken to hospital from the crash scene near Te Kahu Rd. The pair had serious to moderate injuries but were later reported to be in a stable condition.
The highway was closed for just over an hour, before one lane was opened between 7.35am and 11am.
Police were also called to a two-vehicle crash near the Omahu Rd and SH2 roundabout at 10.15am.
One person had to be freed from one of the vehicles by Fire and Emergency crew.
A man in his 20s was taken to Hawke's Bay Hospital where he was in stable condition, as of 12.15pm yesterday.
The road was closed between Omahu Rd and Evenden Rd but reopened at 11.25am.
Police were also called to attend to a motorcyclist who suffered minor injuries after coming off their motorbike in a gravel carpark in Pandora, Napier after 11.30am.
A single-vehicle crash also occurred on SH5 near Te Haroto between Kowaro Roadway and Hukatara Rd.
A police spokeswoman said the crash happened shortly before 4pm when a vehicle rolled.
First reports were that someone had been trapped, but that was not the case, she said.
The morning crashes occurred in fine weather conditions, with dry roads and good visibility.
However, the same can't be said for likely driving conditions in Wairoa on Tuesday, with MetService issuing a heavy rain warning and urging drivers to take care.
MetService meteorologist Andy Best said the heavy rain warning would be in place from 8am until 8pm on Tuesday - an "uncharacteristic start" to the first official day of summer.
"We are expecting between 70 to 90 millimetres to accumulate, with peak intensities of 10 to 15mm per hour," he said.
This could cause rivers and streams in the area to rise rapidly, Best said.
It would also make for "hazardous driving" with the risk of surface flooding and landslips.
"It's something people should definitely be aware of."
He encouraged people to keep checking MetService for the latest updates.
Strong winds could also make travel difficult, with WeatherWatch warning the turbulent weather could lead to flight delays across the North Island.
A WeatherWatch statement said sustained gales were forecast for Wellington Airport overnight, with gusts over 100km/h possible.
The gales were forecast to "brush parts of Manawatu, Taranaki and even into Auckland too".
The good news is that "winds will peak earlier in the day and ease into the afternoon".
WeatherWatch said most airports would notice winds easing back overnight Tuesday and into Wednesday.
"See your airline and airport websites in the morning before travelling to check your flight situation," WeatherWatch advised.