It's hard for the doctors of Doctors Without Borders to do their work in Haiti. Its infrastructure has been devestated by the earthquake, making electricity and water hard to come by. That's why they've developed what they're calling "Plug-and-Play Hospitals," which are inflatable tents with generators and sanitation equipment that can function without connecting to any grid.
It's an amazing setup that's doing essential, heroic work. If you can, donate to Doctors Without Borders to help them keep doing it.