Yes, 50 million climate change refugees by 2020. This PhysOrg article relays the announcement at an AAAS meeting in LA.
With global society strains like this, I expect the US will become more concerned about borders. The GOP will push hard for a wall on the southern border. The accommodation might include a wall, and probably will include drone patrols, added border personnel, maybe even robotic patrols on the ground.
I expect there will be more US Military missions of a humanitarian nature. If soldiers can help people survive where they are, then they won't have to shoot them at our borders. Better strategically to spend our money than their lives.
How to help people stay in a climate stressed region? And how would the military approach a solution? Desalination & water filtering. Localized education in permaculture, composting, solar thermal applications, etc.