United Nations Assistant Secretary-General Navid Hanif speaks at a news conference on Monday, August 31, at the UN headquarters about the report on sea level rising.

United Nations: Kolkata and Mumbai could be severely ravaged by rising sea levels affecting millions of people, a report by United Nations Secretary-General Antonio Guterres warns.

The report released on Monday is studded with red flags about the impacts of sea-level rise caused by global warming, which melts glaciers and ice sheets and warms the waters, affecting property, people, and even cultures.

The annual rise in sea levels reached the highest level ever in 2024, recording nearly six millimetres, said the report released by Secretary-General Amina Mohammed at the 55th Pacific Islands Forum Leaders Meeting.

Palau, a nation of Pacific islands many of which could be substantially smothered by rising ocean waters, is hosting the meeting underlining the dire dangers.