Sorry you can delete this post once it has served it's purpose. Yes water does evaporate regardless of it's contents but something has to act as condensation nuclei because water has to overcome surface tension . Now for clouds to form ice in microscopic forms it has to very cold infact that cold hardly never exists. Now over the ocean tiny salt particles exist in the air as condensation nuclei, if these were removed rain would never occur in a hurricane and condenstation at that too. Not having condensation would drastically reduce the amount of heat in hurricanes as they are fueled by latent heat and convection would not occur. When condensation occurs I believe 570 calories of heat are sent into the atmosphere, that's a lot of heat and evaporatation takes away 70 calories. Just a little infomation on why it rains, I find it very interesting.