You are woefully mistaken. You posit far more water than is encompassed by climate change. Even if the Antarctic Ice Cap melted completely (that would take several centuries) it wouldn’t turn the Earth into Waterworld! A non hyperbolic though still dire risk can be ascertained from an increase in sea level of perhaps 10 ft. this century. That is a high limit btw according to the current estimates of possible melt rates decades hence.
Resorting to hyperbole is fun when you are sitting around a bowl stoned and uncritical but many people try to sound authoritive and yet they think nothing of spouting the most exaggerated and unsubstantiated claims for climate risk. The truth is certainly bad enough as it is and hyperbole is simply not necessary. A strict adherence to the truth (sans hyperbole) educates people over the long term because they feel like they can trust someone who sticks to rigorous fact checking first before they speak. Listeners are then less confused as to what is the real truth and what is excess.
The truth is plenty bad enough in other words. Stick to the truth and be scientific. Resort to hyperbole and become a poet of excess and not to be believed later even when you are talking the truth about something else.