Climate Change Pressures Heat Zones Mean Days Over 30 Degrees Celsius Historical 1980-2009 (Image Service)

<div style='text-align:Left;'><div><div><p><span>Heat Zones map the distribution of potential heat stress for plants and animals, including humans. Heat zones, defined as the number of days per year with maximum daily temperature &gt;= 30 °C (86 °F). Daily maximum temperature values &gt;= 30 °C during the period 1980 - 2009 were tallied annually and are reported as the average annual number of days during a 30-year period.</span></p></div></div></div>