Cyclone-hit Fiji disease outbreak risk

There are fears people left homeless after Cyclone Winston hit Fiji will be at increased risk of disease outbreaks.

Aid agencies fear there could be widespread disease outbreaks in cyclone ravaged Fiji. (AAP)

Aid agencies fear there could be widespread disease outbreaks in cyclone ravaged Fiji with clean water supplies cut off and thousands left homeless.

CARE Australia spokeswoman Sarah Boxall says thousands of people are sheltering in overcrowded evacuation centres and are at increased risk of diarrhoea from water-borne contamination and typhoid and dengue.

"It really is a race against time to get immediate relief to those who have lost everything and ensure families can stay safe and healthy," she said.