# Extreme heat — NORMAL (stable)
id heat · Weather & Hazards · horizon acute · checked 2026-11-01T11:52Z · at this level since 2026-10-31T11:26Z · stale after 2026-11-02T23:52Z
Assessed by an AI model (Anthropic Claude) against published rubrics; not a forecast or advice · CC BY 4.0 · https://canary.danleech.com/s/heat

Value: No major heatwave warnings (1 Nov)
Rated on: No major heatwaves affecting large populations.

October heat records set earlier in the month; no major heatwave now

Why it's at this level: October brought record heat to southern China (39.5°C on 3 Oct) and the central US (13 Oct), but no major heatwave warnings covering large populations were found as of 1 Nov. The strong El Niño raises the risk of Southern Hemisphere heat this summer.

What this means for you: No major heat risk currently. Australia and southern Africa face elevated heat risk into their summer.

Why it matters: Heat is the deadliest weather hazard globally, straining power grids, crops and health systems.
What moves it: Heat domes, climate warming, season, humidity, urban heat islands.

Rubric — Alert: Deadly heatwave with top-tier official warnings across a large population. | Watch: Heatwave warnings across a major region, or national temperature records. | Normal: No major heatwaves affecting large populations.

Sources:
- The Watchers — October heat records across southern China (2026-10-03) https://watchers.news/2026/10/03/october-heat-records-reported-across-southern-china-after-temperatures-reach-39-5c-103-1f/
- The Watchers — Daily high-temperature records across the central US (2026-10-14) https://watchers.news/2026/10/14/daily-high-temperature-records-broken-or-tied-on-october-13-across-parts-of-the-central-u-s/