[Source: The Guardian]

A child has gone missing in a caving system as torrential rain and flooding hit the North Island of New Zealand, with search and rescue teams suspending their search as night fell.

Heavy rain fell throughout Tuesday morning, causing slips and extensive flooding in areas, many of which were devastated by extreme weather in January and February.

A school student remained missing in a cave system in Whangarei, Northland, after a Whangārei Boy’s High School group got into difficulty on Tuesday morning. At 5pm, police said the search for the missing boy by search and rescue, fire and police teams would be suspended for the evening. They had been searching for more than six hours. The search was expected to resume at first light

Supt Tony Hill, the Northland district commander, said it was reported about 10.35am that a group of 15 high school students and two adults – “was in difficulty” doing an exercise in the Abbey caves.

The local council website advises visitors that the “caves can be prone to flash flooding”. Rain began falling steadily in Whangerei on Tuesday morning, with heavy rainfall warnings in place from 9am. Metservice, the national broadcasting service, warned that “heavy rain may cause streams and rivers to rise rapidly”.

Whangārei Boy’s High School principal Karen Gilbert-Smith said in a statement that a year 11 [aged 14-15] outdoor education class had gone to Abbey Caves on a caving trip and “encountered a severe weather event”. “One of our students is currently missing after encountering the weather event,” she said, and the incident was “hugely upsetting for all concerned”.

Across Auckland, flooding was beginning to hit regions still recovering from the last bout of floods, which hit at the end of January. Auckland experienced serious flooding in January which killed four people, and then in February Cyclone Gabrielle caused widespread damage across much of the North Island and left at least 11 people dead.

Officials for New Zealand’s largest city declared a state of emergency early on Tuesday afternoon, as hours of heavy rain swelled the rivers and began to flood roads, homes and businesses in the city.

Metservice issued severe thunderstorm warnings across the Auckland region, and an orange heavy rain warning and other severe weather alerts across the upper North Island.

MetService meteorologist Georgina Griffiths said the heavy rain was expected to last around another five hours and have a significant impact. “The region is so saturated after a very rough four or five months … the Auckland region has received 90% of its annual normal rainfall in the first third of the year.”

Auckland Emergency Management duty controller Rachel Kelleher said at 2pm that there was “flooding across the region, and it’s fairly widespread right throughout, not just in specific areas”. She said rain was falling at a rate of about 30-35mls in an hour, with more heavy rain expected to fall in the afternoon and evening.

Brad Mosby, district manager at Fire and Emergency NZ, said it had responding to more than 200 weather-related incidents in Auckland on Tuesday, including 155 between midday and 2pm. Most were related to flooded buildings and slips, with some people also trapped in vehicles. He said emergency workers were “prioritising those [callouts] that are life risk”.

New Zealand Treasury estimates the cost of the January and February weather events at between NZ$9-14.5bn.