Jackson Curtis: When they tell you not to panic... That's when you run!
President Thomas Wilson: Six months ago, I was made aware of a situation so devastating that, at first, I refused to believe it. However, through the concerted efforts of our brightest scientist, we have confirmed its validity. The world, as we know it, will soon come to an end.
Adrian Helmsley: The moment we stop fighting for each other, that's the moment we lose our humanity.
Noah Curtis: Whoa, that's a big plane.
Yuri Karpov: It's Russian.
Jackson Curtis: It's not just California... It's the whole world.
Carl Anheuser: You're telling me that the North Pole is now some where in Wisconsin?
Professor West: Actually, that's the South Pole now.
Answer: It's really impossible to say, given all of the massive land shifting seen in the film. We see the entire coast of California fall into the ocean. It's reasonable (in the film) to assume some cataclysm struck Kilimanjaro to lower or destroy it, or that the continent has been tilted.
In the movie, it was implied that the continent of Africa as a whole remained unflooded. So it stands to reason that the millions of inhabitants of the various countries may have survived intact. And so, the animals and plant life as well. So the question of saving the human species may be mute in this scenario. It's ironic, since most of the scientific community believes that modern humans evolved there first anyway.