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heat

The American South-Central — the advisory tier widened to 13

On the board · September 19, 2026 →
BUILDING · September 19, 2026 · NO. 0919
THE DOME

The heat firmed rather than faded. Heat advisories rose 10 to 13, across Arkansas, Illinois, Indiana, Kentucky, Missouri, Mississippi, Tennessee, Alabama and Kansas plus Puerto Rico and the US Virgin Islands, with a 108 °F heat index in Middle Tennessee and about 107 °F in Alabama. The forecast side agrees: 90s to low 100s °F near daily records across the South-Central, lower Mississippi Valley and South-east through the weekend. A wider advisory tier is the one that reaches outdoor workers.

THE RECORD

53 turning points on record since Jun 9 — the 8 most recent shown.

Sep 18↑ firmed
Sep 17active → building
Sep 16▽ slipped down the board
Sep 15▽ eased
Sep 13easing → active
Sep 12↑ moved up the board
Sep 11building → easing · eased sharply
Sep 8easing → building
WHO IT TOUCHES
Aviationa typhoon reaching the Tokyo area on a holiday Monday, a hail day over the central Plains, and a rain axis crossing the north-eastern hubs
Eventsa national holiday weekend under a typhoon's rain, and an American Saturday with hail in the Plains and a record-challenging heat index in the South
Healtha 108 °F heat index across nine states, flood-water exposure on three continents, and two humanitarian ledgers still being counted
Agriculturea monsoon retreating over one Indian state while it soaks six others, hail over the central Plains, and a 108 °F field-work ceiling
Energyan evening load peak under a 108 °F index, wind and hail on two continents, and a river that is still a level rather than an event
CONNECTED

One country, one weekend, two hazards that both went up a notch in the same cycle.