The Cook Islands meteorological service says a continuing dry spell has left some homes without a water supply.
The Director of Meteorological Services, Arona Ngari, says the current dryness is consistent with El Nino, with rainfall in the southern group far below average.
Latest statistics show that only 35 millimeters of rain fell in October, compared to 102 mm for the same period last year.
The PacNews news agency reports over 40-thousand litres of emergency supplies of water have been delivered to homes in Nikao, Ruatonga and Avatiu.
