# US heat wave emergency measures

> Live situation record from CLSTR: https://clstr.news/situations/us-heat-wave-emergency-measures
> Updated: 2026-08-05T00:55:09.000Z. Sources: 53. Developments: 2.

In early August 2026, the National Weather Service issued heat advisories for large parts of eastern Oklahoma, northwest Arkansas, and New York’s Hudson Valley, warning of heat‑index values approaching 109 °F and 100 °F respectively. The alerts urged residents to stay hydrated, limit outdoor activity, and seek air‑conditioned environments.

A few days later, New York City escalated its response as the heat wave persisted. Mayor Zohran Mamdani activated emergency plans, opening hundreds of cooling centers across all five boroughs. Catholic Charities distributed 1,200 fans to older adults, and the city deployed 21 COOL vans to check on seniors and provide transport to cooling sites. Additional resources, such as LinkNYC kiosks offering directions to the nearest center, were made available, and residents were instructed to use 311 for non‑emergency concerns and 911 for immediate danger.

## Claims

- A heat advisory was issued for New York City on August 7, 2026 with heat‑index values expected to reach around 100 °F. (corroborated by 4 sources)
- Mayor Zohran Mamdani activated New York City’s Heat and Flash Flood Emergency plans. (corroborated by 2 sources)
- The city opened hundreds of cooling centers across the five boroughs. (corroborated by 2 sources)
- COOL vans were deployed to check on older adults and provide support services. (corroborated by 2 sources)
- Residents were urged to stay hydrated, limit outdoor activity during the hottest parts of the day, and check on vulnerable neighbors. (corroborated by 2 sources)
- Scattered thunderstorms with potential for localized heavy downpours were forecast for Friday afternoon and evening. (corroborated by 2 sources)
- Residents were advised to report non‑emergency hazards such as downed trees to 311 and call 911 for immediate danger. (corroborated by 2 sources)
- LinkNYC kiosks provide walking directions to the nearest cooling center. (single source)
- Catholic Charities of New York distributed 1,200 fans to older adults in Harlem, Lower Manhattan and the Bronx as part of Project Cool. (single source)

## Timeline

### 2026-08-05: Castellón forest fires force evacuations and municipal confinement

Forest fires across Castellón, Spain, prompted evacuations, municipal confinement and a large deployment of ground and aerial firefighting resources.

45 sources. https://clstr.news/cluster/sunny-august-7-2026-forecast-for-art-catoira-and-cedeira

### 2026-08-04: Heat Advisories Cover Oklahoma, Arkansas and New York Regions as Temperatures Near 109°F

Heat advisories for eastern Oklahoma, northwest Arkansas (up to 109 °F) and New York’s Hudson Valley (around 100 °F) warn of heat‑related illness and urge hydration and limited outdoor activity.

8 sources. https://clstr.news/cluster/heat-advisories-cover-oklahoma-arkansas-and-new-york-regions-as-temperatures-near-109f

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Cite as: US heat wave emergency measures. CLSTR, https://clstr.news/situations/us-heat-wave-emergency-measures