Why does global warming melt ice and cause inundation?

Answer 1

Ice melts at 0° C, at standard pressure. So when temperatures rise above that, the increased thermal energy changes the state of solid water to liquid. This results in sea level rise, which will increase flooding of low lying coastal areas.

Answer 2

Global warming increases the Earth's temperature, which leads to the melting of ice in polar regions and glaciers. This melting ice contributes to rising sea levels. In addition, warmer temperatures also cause thermal expansion of water, which further increases the volume of the oceans and results in inundation of coastal areas.