The return of El Nino weather conditions are expected from as early as May this year, potentially affecting global temperatures and rainfall patterns, the World Meteorological Organization (WMO) said.

A clear shift has been observed in the Equatorial Pacific, with sea-surface temperatures rising rapidly, suggesting a high likelihood of El Nino conditions developing between May and July this year, it said.

The weather pattern is known to disrupt regional climates, potentially bringing increased rainfall to southern South America, the southern United States, parts of the Horn of Africa, and central Asia, while causing drought in Australia, Indonesia, and sections of southern Asia.

According to WMO, El Nino ltypically lasts between nine to twelve months.