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Climate Change Pressures Heat Zones Mean Days Over 30 Degrees Celsius RCP45 2010-2039

Published by U.S. Forest Service | Department of Agriculture | Metadata Last Checked: January 27, 2026 | Last Modified: 2025-10-22
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 >= 30 °C (86 °F). Daily maximum temperature values >= 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.

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