Whether they realised it or not, some 7.6 billion people -- 96 percent of humanity -- felt global warming's impact on temperatures over the last 12 months, researchers have said.

But some regions felt it far more sharply and frequently than others, according to a report based on peer-reviewed methods from Climate Central, a climate science think tank.

People in tropical regions and on small islands surrounded by heat-absorbing oceans were disproportionately impacted by human-induced temperature increases to which they barely contributed.

Among the 1,021 cities analysed between September 2021 and October 2022, the capitals of Samoa and Palau in the South Pacific have been experiencing the most discernible climate fingerprints, the researchers said in the report, released on Thursday.

Lagos, Mexico City and Singapore were among the most highly exposed major cities, with human-induced heat increasing health risks to millions.

In 26 cities, at least 250 of the 365 days from October 2021 saw temperature increases that were at least three times more likely due to climate change.