The Water Wars by Cameron Stracher

If you loved The Hunger Games and miss the thrill, The Water Wars is one to put on your summer reading list. Vera lives in a future where North America has been politically reorganized due to wars generated my water crises. Water, not oil, has become the commodity that rules the world. The Chinese are harnessing and capturing the rain before it leaves the clouds. Mega corporations are hoarding water. Environmental terrorists are fighting water pirates for access to impossibly small amounts of water. Those that can divine water make millions and live like kings. Vera and her brother Will hack out an existence with their father until the day that Vera meets Kai. Mysterious, wealthy, and completely unconcerned about water, Kai fascinates Vera then disappears. Vera believes Kai has been kidnapped for his ability to locate water where others believe there is none. Diabetic and in need of insulin, Kai's life hangs in the balance. Vera convinces her brother the two should go look for Kai. Vera and Will embark on adventure that will see them captured by water pirates, rescued by an ultra environmentalist and dangerously cross multiple borders. Vera is a strong female heroine who encourages both sympathy and cheers. While The Water Wars is a read-a-like to The Hunger Games and likely to appeal to the same readers, it is less dark and gruesome. A great roller coaster ride of a read. The Water Wars will appeal to all of those looking for a fast, adventurous read.  

While you are at it, two others you may want to consider are Incarceron  by Catherine Fisher and The Maze Runner by James Dashner. Both pair nicely with The Hunger Games and The Water Wars in the post apocalyptic adventure to survive collection.