---
title: Record Watch — tile-layer & hex-layer
description: Explore the 2026 U.S. heat wave hour by hour — feels-like heat, sleepless nights, records, and how long it holds. A live map from Tomorrow.io.
image: https://info.tomorrow.io/hubfs/heatdome/july4-cover-1x1.png
---

Record Watch

Where the heat didn't just run hot — it pushed into the record books. Each place's peak high set against its own 1990–2021 historical records: the hottest 1% of days for late June, and beyond that into outright record territory.

res — · — cells

below top-1%

top 1%

top 0.1%

record territory

shatters

Layers▾

Select a layer · CONUS

[**Heat Index***peak feels-like*›](https://info.tomorrow.io/heatdome)

[**Persistence***accumulated hot days*›](https://info.tomorrow.io/heatdome/persistence)

[**Sleepless Nights***nights without recovery*›](https://info.tomorrow.io/heatdome/sleepless-nights)

[**Anomaly***how far above normal*›](https://info.tomorrow.io/heatdome/anomaly)

**Record Watch***record-breaking heat*

Tile

Hexagons

Opacity

Show all as

Raster

Hexagons

Units

°F

°C

[☰ All maps & the full gallery](https://info.tomorrow.io/heatdome)

►

 

![Tomorrow.io](https://info.tomorrow.io/hubfs/Tomorrow%20Logos/White-Logo.png)

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[The storyOne heat wave, global to local →](https://info.tomorrow.io/heatdome/story)