5. Rapid Heartbeat
If you have spent a lot of time in the sun and then notice that your heart is beating quite rapidly, it can be a sure sign that there is something seriously wrong. The heart starts to beat faster when it is feeling stressed. When the body is exposed to extreme heat conditions, the heart will beat faster because it needs to make sure that the natural cooling systems of the body are working in order to keep the temperature of the body balanced.
If you have any of the other symptoms on this list and you notice that your heart is beating faster than normal, seek medical attention immediately. A rapid heartbeat is a sure sign that there is something wrong in the body and you will want to make sure that you are checked out by a medical care provider to determine what is going on.