---
title: The 2026 Heat Wave — global to local · Tomorrow.io
description: Scroll the 2026 heat wave from the European dome to your street — feels-like heat, sleepless nights, records, and the cost to people, harvest, and grid.
image: https://info.tomorrow.io/hubfs/heatdome/july4-cover-1x1.png
---

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

⤓ Capture frame

[Live mapExplore the Interactive Map →](https://info.tomorrow.io/heatdome)

📍See your area

Use my location

Tomorrow.io · FOCUS · Jun 27 – Jul 6, 2026

# One heat wave, around the world and down your street

A planet-scale heat event — read from Tomorrow.io's own model, global to local, hazard to impact. Scroll; the map moves with the story.

↓ Scroll to begin

[Or open the live interactive map →](https://info.tomorrow.io/heatdome)

02 · Magnify: the U.S.

## Then it crossed the Atlantic

118.9°F peak

Magnify into the United States — the eastern two-thirds is falling under one contiguous dome. Danger-range heat is forecast to reach about a third of the Lower 48.

[Explore this lens, interactive →](https://info.tomorrow.io/heatdome)

03 · The forecast

## What's coming

105–110°F

The forward look: Major-to-Extreme HeatRisk from the Midwest and Mississippi Valley to the East Coast, heat indices 105–110°F with record-warm lows. Forecast days are FOCUS (honestly cross-model).

[Explore this lens, interactive →](https://info.tomorrow.io/heatdome)

07 · The lenses · duration

## How long it holds

5days

The same field, cut a different way: the longest unbroken run of 90°F+ days. Spike vs. siege.

[Explore this lens, interactive →](https://info.tomorrow.io/heatdome/persistence)

07 · The lenses · night floor

## When the night won't let go

68°F floor

Nights the low never drops below 68°F — no overnight reset. Warm nights drive heat mortality more than daytime peaks.

[Explore this lens, interactive →](https://info.tomorrow.io/heatdome/sleepless-nights)

07 · The lenses · rarity

## How far above normal

+10°F

Against the local normal, the core runs up to +10°F. The desert reads 'normal summer' for itself; the north-central reads 'historic.'

[Explore this lens, interactive →](https://info.tomorrow.io/heatdome/anomaly)

08 · Records

## Where records are breaking

23% of CONUS

Not just hot — record-breaking. Nearly a quarter of the country is reaching the top-1% of the record; 13% is crossing into record territory.

[Explore this lens, interactive →](https://info.tomorrow.io/heatdome/records)

The method

## One field, many honest reads

Every scene is the same heat field, read a different way — pulled from Tomorrow.io's FOCUS model, global to local. Rarity vs ERA5's record. The pixel claims only what the data earned.

[Explore all lenses, interactive →](https://info.tomorrow.io/heatdome)

## Follow this forecast

We'll send you what changes — the weather intelligence behind this page, as it moves.

Follow

A forecast, not a sales pitch. Unsubscribe anytime.

✓ You're following. The forecast will find you.