During the coldest days in Antarctica, she was deliberately dehydrating herself to avoid the need to get undressed in the bitter frost.

CNN: STORY HIGHLIGHTS

He also drinks water which has prevented him from dehydrating.

BBC: Daniel Harrison

It is more likely that cycling combined with the dehydrating effects of a ten-hour plane trip plus a heat wave threw his electrolytes out of balance and triggered an event.

FORBES: Hidden Dehydration Danger