The world's oceans are rising and the rate is accelerating. The best case scenario will give us 28-55 cm by 2100. The worst case scenario is over 2 meters. A 2 meter sea level rise would displace 1/10th of the entire world's population.
www.theguardian.com

‘It’s absolutely guaranteed’: the best and worst case scenarios for sea level rise
Even if the world stopped emitting greenhouse gases tomorrow, ocean levels would continue to rise