conditions, which involves temperature and high elevation. >> we can barely hover here. the pilot says the area is too unstable to get any closer to the beach. heli-extraction here is too risky. we're just going to do a food drop and get out of here. >> this is not good. the only thing that they can help us with is just throw supplies from the sky. extraction is not possible. if someone gets injured, that's game over, and nothing will happen. and so it just had a whole other level of commitment. >> that's only when it's clear to the whole group we have to go downstream to leave the river. through may 30th with ihop 'n go. ♪ download the app and earn free food with every order.