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Flooding is receding in the Hawke's Bay, but State Highway 50 between Ongaonga and Tikokino southwest of Hastings remains closed.

Heavy flooding in the Hastings suburb Flaxmere earlier this afternoon saw parts of it isolated and police warn motorists off the roads.

Rain pelted down on Hayley Westenra concert goers in the outdoor venue Black Barn, but did not deter them from persevering to enjoy the show.

Flaxmere roads were accessible again shortly before 8pm, police said.

However, there was still some minor flooding and police urged caution.

Sections of SH5 between Napier and Taupo were also affected by flooding earlier today.

The heavy rain is moving south, with 80mm predicted by MetService in the southern and eastern hills and ranges of Wairarapa through to late Saturday morning.

It warned rivers and streams were likely to rise rapidly.

A heavy rain watch was also in force for the hills and ranges of Wanganui, northern Manawatu and eastern and souther parts of Wellington.

There was also rain in the South Island today, with the World Buskers Festival in Christchurch disrupted because of downpours.

- NZPA