To a point. Hypothermia is when your body starts dropping too low in temperature for it to be able to function. Everything slows down and gets confusing. If you're warmer than you should be and want to sleep and are having difficulty focusing, you've gone past just being cold and are in trouble. If your body temperature stays too low, things will start shutting down and you'll die.

[Nami's not Chopper, but she thinks she's covered the basics.] So we get your temperature back up to where it should be. The tea will help. [So will the blankets and the extra coat and the gloves and the--yeah. Drink that first.] Then we should take you to the clinic.