Heat Atlas

PLATE I · THE UNITED STATES

Sample late-May Wet Bulb Globe Temperature per state · USMC Order 6200.1E flag colors

Edition 1 · Surveyed 2026-05-22 · In the field · Recorded DEMO — SAMPLE DATA

WHITE — < 26.7°C

GREEN — 26.7–29.4°C

YELLOW — 29.4–31.1°C

RED — 31.1–32.2°C

BLACK — ≥ 32.2°C

Sample WBGT values reflect rough late-May climatological ballparks per major metro per state. These are illustrative — not real-time. Not advice. Real-time WBGT for any location is available via the HeatMCP get_wbgt tool (Saturday hackathon work). USMC flag thresholds drawn from MCO 6200.1E (2018).

Try a trace overlay: ?trace=demo-001 (Phoenix) · ?trace=demo-002 (Death Valley) · ?trace=demo-003 (Atlanta)

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