The infrequent weather phenomenon La Nina may be fueling Hurricane Georges and could signal more dangerous Caribbean storms to come, the U.N. environment agency said Friday in Nairobi, Kenya.

La Nina, or "little girl" in Spanish, is a result of below normal drops in Pacific Ocean temperatures and is often referred to as the opposite of the El Nino phenomenon, which is caused by abnormal warming in the Central and Eastern Equatorial stretch of the Pacific.El Nino has been blamed over the past year for unusually intense drought, rainfalls and subsequent floodings around the globe.

"El Nino is now over and the other side of the coin, the less frequent La Nina, is under way," said Klaus Teopfer, head of the U.N. Environmental Program. "If La Nina develops how we think it might, then the concern is that the frequency of storms like Georges might increase."