Havelock North woman Jane Muller is appealing for Hawke's Bay people to help with a food crisis developing in southern Cambodia.
Mrs Muller and her husband Hugh regularly work in the region voluntarily for the Cambodia Charitable Trust.
"The rainy season is late and families are unable to plough fields to plant their rice crops," she said.
"This has more effect than simply a longer dry season, it means that the rice crop can't be planted on time.
"By November many families will be hungry - hungrier than usual. There will be less rice available and it will be too expensive for the rural poor.