Factual error: Several scenes in the movie show the tidal waves and tsunamis sweeping people and objects away, which is utter fantasy. The air pressure wave that is in front of the tidal waves and tsunamis would blow people and objects away long before the water did.
Factual error: After taking off from Las Vegas for Tibet, our heroes try to refuel the Antonov in Hawaii, only to find the islands devastated. The route from Las Vegas to Tibet takes you nowhere near Hawaii. In fact, Hawaii is only 500 km (300 miles) closer to Tibet than Las Vegas. Also, they expect to go down somewhere in the South China Sea, but the route from Hawaii to Tibet would take them just north of Japan and nowhere near the South China Sea, which is 3000 km (1900 miles) further south.
Factual error: When Adrian is looking at Jackson's license, it shows his first name, last name. As in: JACKSON, CURTIS. Should be last name first, first name last. As in: CURTIS, JACKSON.
Factual error: In the beginning of the film, when they are in India, the scientist says the temperature could reach 100 degrees Fahrenheit. India uses the metric system, not imperial.
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 moot in this scenario. It's ironic, since most of the scientific community believes that modern humans evolved there first anyway.