Vampire Apocalypse

The world as we know it is gone. The ice caps have melted and shifted south, devastating the northern territories and eradicating major cities such as New York and London, which are now underwater and frozen. Humans died off during an epidemic prior to the ice disaster, and many more died during the floods at the start of this new ice age. These events have forced vampires out of hiding. In order to ensure that their food source wouldn't completely die off, the vampires have sequestered the remaining humans into farms and taken control of all that remains of civilization.

Since the world froze and the humans died off, blood has become scarce. There’s barely enough to sustain the vampire population, even though their masses have dwindled. Many are reduced to the measly few drops of blood rationed to them by the Regent, which is enough to keep them alive, barely. As time passed, fangs retreated, reflections appeared, and light was no longer destructive. Vampires can now walk in the full sunlight without turning to ash.