Extreme temperatures and high humidity are engulfing parts of the central and southern US.<br />According to CNN, the intense weather is setting the stage for life-threatening conditions in the area.<br />Experts warn that the seriousness of excessive heat cannot be overstated.<br />Although hurricanes and tornadoes get the most attention, heat is the top weather killer.<br />Heat kills nearly twice as many Americans per year than tornadoes and almost three times more than hurricanes.<br />Heat and health advisories are in effect for over 22 million Americans from Missouri to Texas.
