- Dizziness
- Palpitations
- Rapid pulse
Because these symptoms are similar to those experiencing anxiety attacks, it is possible that the symptoms themselves could bring on an anxiety attack as even the thought of having a panic attack can increase the likelihood of anxiousness developing into a panic attack.
References:
"Heat Intolerance", Updated 2010, April 20, Updated by Ari Eckman, M.D., A.D.A.M. Medical Encyclopedia
"Seasonal Depression Can Accompany Summer Sun", 2002, Aug 13, Sara Ivry, The New York Times
"What is Seasonal Depression?", 1995-2009, The Cleveland Clinic Foundation

