Yes, it is out there!  Another book about an underground civilization.  Much like GREGOR THE OVERLANDER or from what I have been told, CITY OF EMBER, a group of people have sought refuge below the surface. For 7 generations these people have survived in Gracehope, but are now under threat of surface issues . . [...]

If you are interested in reading fictional stories based on real natural disasters, and the great lengths the survivors took to stay alive (like DARK WATER RISING), then you will surely like NIGHT OF THE HOWLING DOGS by Graham Salisbury.  This is a survival story that takes place during the 7.2 tsunami that engulfed Halape, Hawaii [...]