Source / pinned edition

Heat Index classification

Source of package us.nws.heat_index · NWS Amarillo, Heat Index

work: urn:us:nws:heat-index#NWS_HEAT_INDEX_CATEGORIES
number: NWS Amarillo, Heat Index
kind: urn:us:nws:heat-index#guidance

Page as retrieved on 17 September 2026

edition: urn:us:nws:heat-index#NWS_HEAT_INDEX_CATEGORIES_2026
language: en
officiality: unofficial
materialisation: PINNED_UNOFFICIAL_COPY
life cycle: adopted: 2026-09-17; in_force: [object Object]

Publications

URI	Type	documentHash	Retrieved
https://www.weather.gov/ama/heatindex	text/plain; charset=utf-8	sha256:81d1d972fd7982baba33ea88d76ed4b6b8dc1b974422f49ddc81e3026da888ee	2026-09-17T00:00:00Z

Fragments — 2

categories · table · referenced by: 4

en · unofficial · sha256:0652272efd0e97a5e18c55ed0bcde80c3d851f6f5dcfcf934ef4a890e1beb79a

Caution 80°F - 90°F Fatigue possible with prolonged exposure and/or physical activity Extreme Caution 90°F - 103°F Heat stroke, heat cramps, or heat exhaustion possible with prolonged exposure and/or physical activity Danger 103°F - 124°F Heat cramps or heat exhaustion likely, and heat stroke possible with prolonged exposure and/or physical activity Extreme Danger 125°F or higher

Referencing norms: caution, danger, extreme-caution, extreme-danger

sunshine · paragraph · referenced by: 3

en · unofficial · sha256:03c9733bd7759ffe01bec0c549dd85942b088319c73c7c03f679f071ef0d0b0a

It surprises many people to learn that the heat index values in the chart above are for shady locations. If you are exposed to direct sunlight, the heat index value can be increased by up to 15°F. As shown in the table below, heat indices meeting or exceeding 103°F can lead to dangerous heat disorders with prolonged exposure and/or physical activity in the heat.

Referencing norms: dangerous-from, shade, sunshine

The hash beside the text is the sha256 of its exact bytes. It is the check that the text shown matches the one pinned in the package: a divergence fails the oracle’s static analysis.