HONOLULU - Close to three quarters of the world's population will be exposed to deadly heatwaves by the year 2100.

That's according to a study led by a University of Manoa researcher Camilo Mora.

The study points out that the number of heatwaves will increase due to rising temperatures and higher humidity.  According to Mora, heatwaves will last longer as well.

The study suggests deadly heatwaves are inevitable because of the existing damage present on Earth but a dramatic reduction in greenhouse gas emissions could help cut down the number of heatwaves.