An individual who has an eating disorder along with intense thirst and wildly varying body temperatures may have a dysfunction of the medulla. hypothalamus. thalamus. pons. brainstem.

May have a dysfunction of the hypothalamus.  The following brain areas serves as the major control center of the autonomic nervous system and endocrine systems hypothalamus and the "thermostat" or nucleus that monitors blood temperature is located in the Hypothalamus.  The following is a function of the hypothalamus it involved in psychosomatic illnesses. 

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explanation:

plate tectonics and volcanic euptions

over time, plate tectonic processes cause continents to move to different positions on the globe.

for example, britain was near to the equator 300 million years ago, and therefore was hotter than it is today. for further details look at our climate through time poster or online map.

the movement of the plates also causes volcanoes and mountains to form and these too can contribute to a change in climate.

mountain ranges formed by plate tectonics. large mountain chains can influence the circulation of air around the globe, and consequently influence the climate.   warm air might be deflected somewhere cooler by the mountains.