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Population Impact

How many people the weather is actually affecting — mapped from a 1-kilometer population grid onto the NOAA/NWS forecast. Every figure below counts real people under a live alert or a forecast threshold across the Lower 48.

CONUS POPULATION
—
2026 estimate · lower-48
UNDER ACTIVE ALERTS
—
mapped NWS alert areas
HIGH ≥ 90°F TODAY
—
forecast heat exposure

7-Day Exposure Card

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Interstate guide sign summarizing 7-day U.S. temperature exposure by population
The week's temperature exposure as an overhead highway sign — refreshed with each NDFD cycle. Download ▸

The Average American

7-Day Peak Exposure

EACH PERSON'S HOTTEST DAY THIS WEEK
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Temperature Exposure

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By State — Today

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Avg High and Avg Low are population-weighted — the temperature the average resident of that state experiences (big metros count more than empty land). Exposure columns count residents whose forecast high crosses the threshold.

Active Alerts