How long did the Grasshopper Fire last?

The official perimeter only gives the start date (24 July 2026). The end comes from the heat detections inside the perimeter: it burned until 31 July 2026 (8 days from 24 July 2026), the last day with detections before more than 10 days in a row without any, so it is approximate.

How much area did it burn?

The official perimeter published by United States agencies (MTBS / NIFC) is 38,029 hectares (380.3 km²). Other tallies, such as daily incident reports, may give slightly different figures.

Which counties burned?

The fire entered 2 counties: Wasco (38,534 ha, 6.2 %); Hood River (38,368 ha, 28 %).

What was the weather like?

During the fire the temperature reached 29.1 °C, humidity dropped to 14 % and gusts hit 58 km/h. The fire danger index (FWI) reached 38, class Very high.

Where does this data come from?

From the official burnt perimeter of United States agencies (MTBS / NIFC, public domain), NASA FIRMS VIIRS hotspots and the administrative boundaries of United States. It is not an official report.

US · United States · 2026-07-24 → 2026-07-31

Grasshopper Fire, July 2026 Wasco, Hood River

Out · last detection 31 Jul 2026, 21:29 UTC

The fire started on 24 July 2026 in Wasco, United States, and satellites saw it burning for 8 days. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 38,029 hectares, spread across 2 counties.

We are reviewing this page: some of its data look inconsistent (the place, the dates or the area), so treat them with caution.

Compare with…

Suggestions: South Valley Road · 2018 Larch Creek · 2024 White River · 2020 Miller Road · 2022

Burnt area: 38,029ha; official perimeter (MTBS / NIFC)
Duration: ≈ 8days; 24 Jul 2026 – 31 Jul 2026
Counties hit: 2; counties
Started on: 24 Jul; 2026
Heat detections: 1,982; in a single hotspot: 451 MW
Danger at start: 34; High · FWI index
Average daily power: 4.3GW; detected power per day, on average

HOTSPOTS BY DAY 24 Jul31 Jul

Play back 31 Jul 2026

How it evolved, day by day

24 Jul 26 Jul 28 Jul 30 Jul

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

The weather it burned in

29°high

58km/h · peak gust

14%lowest humidity

It had gone 26 days without rain (1 mm or more) when it started.

This area had burned before

3% of the perimeter overlaps earlier fires recorded since 2016: 1,093 ha in 2018, 702 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 1,196 ha that had burned before.

How big is it?

It burned the equivalent of 24% of the area of London (380 km² against 1,583 km²).

London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).

This compares size, not location: both shapes are at the same scale, north up, centred on each other.

What happened to each county

Wasco where it started

38,534 ha reached on 24 Jul

6.2 %
Hood River

38,368 ha reached on 25 Jul

28 %

Burnt area inside each county, from crossing the official perimeter with administrative boundaries. The distance runs from the point marking the centre of each area to the nearest fire: staying a kilometre away does not mean it reached the houses.

People and buildings inside the perimeter

GHSL 2025

Built-up area2.2 ha

Residents≈ 40

Inside the perimeter there were about 2.2 hectares of built-up land and about 40 residents (GHSL 2025, satellite-based estimate).

This is an estimate on 100 m cells, made from satellite imagery and census data: it does not mean that homes burned or that anyone was harmed. The perimeter also contains land that never burned. The GHSL 2025 epoch is a projection made from 2020 and earlier data.

Source: Global Human Settlement Layer (GHS-BUILT-S and GHS-POP R2023A), European Commission Joint Research Centre (JRC), © European Union, CC BY 4.0. Sum inside the perimeter computed by WorldFires. human-settlement.emergency.copernicus.eu

The weather day by day

ECMWF ERA5 reanalysis at the fire location, the standard reference for past weather, and the Canadian Fire Weather Index (the same system Copernicus uses), computed by WorldFires from that data. Days after the fire run until the first rain.

Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)

Day	High	Min. humidity	Peak gust	Rain	Danger (FWI)
24 Jul	28.2 °C	23 %	49 km/h	0.3 mm	High 34
25 Jul	21.4 °C	31 %	58 km/h	0.0 mm	High 35
26 Jul	23.0 °C	27 %	48 km/h	0.0 mm	High 32
27 Jul	25.0 °C	25 %	44 km/h	0.0 mm	High 32
28 Jul	21.4 °C	32 %	50 km/h	0.0 mm	High 31
29 Jul	23.4 °C	25 %	41 km/h	0.0 mm	High 31
30 Jul	23.7 °C	25 %	37 km/h	0.0 mm	High 30
31 Jul	29.1 °C	14 %	37 km/h	0.0 mm	Very high 38
1 Aug after	18.6 °C	41 %	59 km/h	0.0 mm	High 33
2 Aug after	17.2 °C	30 %	55 km/h	0.0 mm	High 32
3 Aug after	19.9 °C	24 %	40 km/h	0.0 mm	High 28
4 Aug after	24.2 °C	17 %	36 km/h	0.0 mm	High 33
5 Aug after	29.2 °C	12 %	25 km/h	0.0 mm	High 37
6 Aug after	31.2 °C	10 %	33 km/h	0.0 mm	Very high 45
7 Aug after	28.8 °C	17 %	46 km/h	0.0 mm	Very high 48
8 Aug after	26.2 °C	18 %	51 km/h	0.0 mm	Very high 48
9 Aug after	24.8 °C	19 %	52 km/h	0.0 mm	Very high 46
10 Aug after	23.3 °C	23 %	45 km/h	0.0 mm	Very high 40

Before and after, from space

Drag the line to compare the same ground before the fire and after it.

↔

Before · 17 Jul 2026

After · 7 Aug 2026

Before After

If the day is cloudy, change the date: each satellite passes once a day. In false colour the burnt ground looks brown or red.

The smoke

CAMS · Copernicus

On 2 August 2026 the air beside the fire reached 240 µg/m³ of PM2.5. That day averaged 98: 6.5 times the WHO daily guideline (15).

PM2.5 peak240 µg/m³

Days over the guideline10 days

PM10241 µg/m³

Optical depth1.65

WHO 15

22232425262728293031123

Good Fair Moderate Poor Very poor Extremely poor

Particles from the Copernicus CAMS model at the centre of the perimeter; these are not measurements in each town. The pale bar is the worst hour, the solid one the daily average.

Open-Meteo.com (CC BY 4.0) · Copernicus Atmosphere Monitoring Service (CAMS)

Detections table · 1,982Every satellite heat detection, one by one, with time, satellite, power and coordinates.

⬇ Download CSV Times in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.

Date and time	Satellite	FRP (MW)	Lat	Lon

Other fires nearby

All fires in United States ›

Frequently asked questions

How long did the Grasshopper Fire last?: The official perimeter only gives the start date (24 July 2026). The end comes from the heat detections inside the perimeter: it burned until 31 July 2026 (8 days from 24 July 2026), the last day with detections before more than 10 days in a row without any, so it is approximate.
How much area did it burn?: The official perimeter published by United States agencies (MTBS / NIFC) is 38,029 hectares (380.3 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?: The fire entered 2 counties: Wasco (38,534 ha, 6.2 %); Hood River (38,368 ha, 28 %).
What was the weather like?: During the fire the temperature reached 29.1 °C, humidity dropped to 14 % and gusts hit 58 km/h. The fire danger index (FWI) reached 38, class Very high.
Where does this data come from?: From the official burnt perimeter of United States agencies (MTBS / NIFC, public domain), NASA FIRMS VIIRS hotspots and the administrative boundaries of United States. It is not an official report.

Where to verify it

A satellite detection is not an official report. Final figures and the fire’s status are published by each country’s emergency service.

Emergency number: 911 · Emergency number and official warnings ›

Satellite cross-check

NASA FIRMS ↗
NIFC · Fire maps ↗

History of this page Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.

No changes since 24 October 2026.

RSS Changes to this page

Does something look wrong on this page?

This page is built from satellite data and official records, and it sometimes gets things wrong: the wrong dates, the wrong town, two fires merged into one, or something that was not a wildfire at all. If you know this fire first-hand (you live nearby, saw it, fought it or reported on it), tell us what really happened and we will check it.

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What really happened?

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How we know this

Perimeter: NIFC WFIGS (United States), official.
The official perimeter has no end date: the end is the last day with VIIRS detections inside the perimeter before a gap of more than 10 days (150 days at most), so it is approximate. 1,982 Suomi-NPP VIIRS detections on those dates.
We have not matched this page with any official record.
Weather: Copernicus ERA5 reanalysis at the fire location, in cells of about 25 km.
Built-up area and population come from the JRC Global Human Settlement Layer (epoch 2025, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.

How we build fire pages: methodology ›

Where this data comes from

The perimeter is official and in the public domain. For past years it comes from MTBS (Monitoring Trends in Burn Severity), run by the U.S. Geological Survey and the USDA Forest Service, which map it on Landsat and Sentinel-2 imagery. For the current and last year it comes from WFIGS at the National Interagency Fire Center (NIFC): incident perimeters mapped by fire crews, aircraft and imagery. Heat detections come from the VIIRS sensors aboard Suomi-NPP and NOAA-20, distributed by NASA FIRMS at 375 m resolution. County boundaries come from geoBoundaries ADM2 (Public Domain). The area per county is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ slightly from official figures.

Where it burned