The nationwide heat wave and heat alerts

O que mudou

• 113 heat-associated deaths confirmed as of Aug. 22, with 584 suspected deaths under investigation.
• Extreme Heat Warning issued Aug. 27 at 11:37 AM MST until Aug. 29 at 8:00 PM MST for 106 to 1156F heat.
• Annual confirmed deaths were 645 in 2023, 608 in 2024 and 430 in 2025 before the 2026 surge.

Então ainda em aberto

• How many of the 584 pending cases will ultimately be confirmed as heat-associated, and when those rulings will be complete.
• The precise helicopter heat threshold and the full record of any heat-driven groundings or diverted trail rescues.

O que dissemos que iríamos acompanhar

• Whether the fall adjudication of pending cases pushes 2026 past the 2023 record of 645.
• Whether relief sites, ice distribution and hospital coordination can keep pace if extreme heat extends into September.

O que mudou

• 81 heat deaths confirmed in Maricopa County as of Aug. 18, versus 35 a year earlier, with 587 cases pending.
• About 90 million people were under heat advisories across the U.S. on Aug. 20.
• By Aug. 22 the county toll had reached 113 confirmed with 584 under review.
• Phoenix hit 115°F and 117°F on Aug. 25-26, tying the Sky Harbor record.

Então ainda em aberto

• No final 2026 toll can be set until the hundreds of pending cases are reviewed.
• No breakdown yet shows who died, where, and whether indoor, outdoor, or vehicle exposure drove the increase.

O que dissemos que iríamos acompanhar

• Whether late-August record heat pushes weekly confirmations further toward the 2023 record of 645.
• Whether the forecast shift to sub-110 highs and rain chances at month's end brings sustained relief.

O que sabíamos inicialmente

• Seven people were transported to hospitals during Friday's Banana Ball event at Albertsons Stadium.
• Officials fielded over 140 calls for assistance over seven hours Friday with police, fire, paramedics and campus safety responding.
• More than 45 million people from California to the Dakotas were under heat alerts Sunday.
• Boise hit at least 100 degrees Friday and Saturday; Saturday saw similar transports despite added shade, fans and water.

Então ainda em aberto

• No provided source confirms Tropical Storm Genevieve, Southern California rip current risk, or lifeguard staffing and rescue claims.
• No full official quotations are available; Boise State and forecaster statements are truncated in the sources.

O que dissemos que iríamos acompanhar

• Whether inland heat alerts extend beyond Sunday and how Boise revises stadium heat policy after back-to-back transports.
• Whether wildfire risk tied to the dome produces further evacuations in Arizona, Montana and eastern Washington.