Category A - full version without watermark 720x576 (check terms and conditions at www.teledesign.de) The embed version with watermark is free of charge. Sunstroke is a medical emergency that occurs after getting too much direct sun. Signs are headache, dizziness, and weakness that later lead to confusion and loss of consciousness. Fainting due to a drop in blood pressure and a decrease of the oxygen supply to the brain is an illustration of a temporary loss of consciousness.