This is the third report in a series of reports that investigates the survivability of the MS2 virus in harsh environments. The first two reports study the effects of pH on the virus. In this report, we study the effect of elevated temperatures on the virus. The stability of the virus was studied by counting the number of virus particles using the Integrated Virus Detection System (IVDS). Test results show that the virus particles are relatively stable for a limited time (up to 0.50 hr) at temperatures as high as 63 degrees C. Longer exposure or exposure to higher temperatures, results in quick breakdown of the virus particles.