You are an EMT in Arizona called to a 47 year old female hiker who passed out after a 10km hike. Her husband reports that she consumed a large amount of water on the hike but ate little food. He reports that near the end of the hike she complained of nausea and a headache, and that she was acting strangely. She had a seizure within minutes after finishing the hike. You rapidly transport her to the nearest emergency department. Her husband rides with you and asks what happened to her. How do you describe the mechanism to him?
