Ideas

Ai and Eiji left the base and headed outside. The rain was still coming down just as heavy as before, making Ai frown. "Eiji, before we do anything with the machina's, we will need to build a trench to allow the water a place to flow outside the base, or this place will become too radiated. We are probably already too late, but it is still worth a try. Also, strip, we can't keep losing clothing to the radiation. I told Mai earlier to keep the cameras off and to keep all the shutters closed." 

 Basically, all clothing they wore in the rain had to be tossed out. They couldn't wash it in the base fear of contaminating everything else. "Are we really going to do this naked?"