You and a small group of friends are on a late May rafting trip on the Main Salmon River in Idaho. The day time temperatures have been in the 40s and 50s with less sun than expected, lots of clouds, and occasional rain. The past few nights have been below freezing with a heavy layer of frost covering everything upon awakening. The water temperature is in the low 40s. Upon arrival at camp on day three of the five day trip one member, a 26 y/o male complains of cold, numbness, and achy pain in his feet. On examination you see (refer to photo). He says the pain started yesterday and has gotten worse throughout the day today. Your friend is the only person wearing sneakers and wool socks while on the water; the others are wearing thick wet suit booties.
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