Brown Fire, July 2024 Pima
The fire started on 11 July 2024 in Pima, United States, and satellites saw it burning for 1 day. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 564 hectares, spread across a single county.
It is the 323th largest in Arizona since 2016 (of 380 with a page). Number 305 in United States in 2024, of 371.
We have the official perimeter (MTBS / NIFC) for this fire, but the VIIRS sensors did not capture it in enough detail: no day-by-day evolution, but the split by county is there.
- Burnt area
- 564ha
- official perimeter (MTBS / NIFC)
- Duration
- 1day
- 11 Jul 2024 – 11 Jul 2024
- Municipalities hit
- 1
- counties
- Started on
- 11 Jul
- 2024
- Danger at start
- 61
- Extreme · FWI index
Where it burned
The weather it burned in
It had gone 7 days without rain (1 mm or more) when it started. Rain came after the fire: 9.1 mm on 14 Jul.
This area had burned before
17% of the perimeter overlaps earlier fires recorded since 2016: 95 ha in 2016.
What happened to each town
-
Pima where it started563 ha0.0 %
Burnt area inside each county, from crossing the official perimeter with administrative boundaries. The distance is from the town centre to the nearest fire: staying a kilometre away does not mean it reached the houses.
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) |
|---|---|---|---|---|---|
| 11 Jul | 39.1 °C | 17 % | 46 km/h | 0.4 mm | Extreme 61 |
| 12 Jul after | 38.5 °C | 13 % | 35 km/h | 0.0 mm | Extreme 51 |
| 13 Jul after | 37.7 °C | 21 % | 38 km/h | 0.8 mm | Very high 44 |
| 14 Jul after | 33.5 °C | 34 % | 35 km/h | 9.1 mm | Low 10 |
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
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 · CopernicusOn 10 July 2024 the air beside the fire reached 11 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).
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)
Other fires nearby
Frequently asked questions
- How long did the Brown fire last?
- It burned between 11 July 2024 and 11 July 2024: 1 day, according to the start date recorded by United States agencies (MTBS / NIFC) and the heat detections seen by satellite.
- How much area did it burn?
- The official perimeter published by United States agencies (MTBS / NIFC) is 564 hectares (5.6 km²). Other tallies, such as daily incident reports, may give slightly different figures.
- Which counties burned?
- The fire only entered Pima (563 ha, 0.0 %).
- What was the weather like?
- During the fire the temperature reached 39.1 °C, humidity dropped to 17 % and gusts hit 46 km/h. The fire danger index (FWI) reached 61, class Extreme.
- 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
- NIFC · National Interagency Fire Center ↗
- InciWeb · Incident Information System ↗
- MTBS · Monitoring Trends in Burn Severity ↗
Satellite cross-check
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.
Report an error
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.