How long did the Hon Dat fire last?

GWIS (Copernicus) dates it between 8 April 2026 and 24 April 2026: 17 days between the first and last heat detection of the perimeter.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,162 hectares (31.6 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire entered 2 municipalities: Hon Dat (3,129 ha, 3.0 %); Tan Hiep (52 ha, 0.1 %).

What was the weather like?

During the fire the temperature reached 35.5 °C, humidity dropped to 42 % and gusts hit 38 km/h. The fire danger index (FWI) reached 22, class High.

Where does this data come from?

From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Vietnam (geoBoundaries). It is not an official report.

VN · Vietnam · 2026-04-08 → 2026-04-24

Hon Dat fire, 8 April 2026 Hon Dat, Tan Hiep

Out · last detection 24 Apr 2026, 06:42 UTC

The fire started on 8 April 2026 in Hon Dat, Vietnam, and satellites saw it burning for 17 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,162 hectares from heat detections, spread across 2 municipalities.

It is the 6th largest in Kiên Giang since 2016 (of 23 with a page). Number 19 in Vietnam in 2026, of 97.

Burnt area: 3,162ha; GWIS perimeter (Copernicus)
Duration: 17days; 8 Apr 2026 – 24 Apr 2026
Municipalities hit: 2; districts
Started on: 8 Apr; 2026
Heat detections: 97; in a single hotspot: 63 MW
Danger at start: 20; Moderate · FWI index
Energy released: 1.0GW; sum of detected power

Play back 24 Apr 2026

HOTSPOTS BY DAY 8 Apr24 Apr

How it evolved, day by day

810121314161718192021222324

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

The weather it burned in

36°high

38km/h · peak gust

42%lowest humidity

It had gone 26 days without rain (1 mm or more) when it started. Rain came after the fire: 1.0 mm on 25 Apr.

This area had burned before

No earlier perimeters overlap this fire since 2016, when the satellite record begins.

What happened to each town

Hon Dat where it started

3,129 ha reached on 6 Apr

3.0 %
Tan Hiep

52 ha reached on 6 Apr

0.1 %

Burnt area inside each municipality, from crossing the GWIS 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)
8 Apr	34.7 °C	48 %	31 km/h	0.0 mm	Moderate 20
9 Apr	34.4 °C	46 %	27 km/h	0.0 mm	Moderate 20
10 Apr	33.9 °C	50 %	26 km/h	0.0 mm	Moderate 20
11 Apr	32.9 °C	58 %	38 km/h	0.5 mm	Moderate 20
12 Apr	34.4 °C	51 %	37 km/h	0.0 mm	Moderate 20
13 Apr	33.6 °C	54 %	32 km/h	0.0 mm	Moderate 19
14 Apr	34.1 °C	51 %	26 km/h	0.0 mm	Moderate 19
15 Apr	34.0 °C	59 %	34 km/h	2.9 mm	Low 6
16 Apr	35.5 °C	48 %	23 km/h	0.6 mm	Moderate 15
17 Apr	35.2 °C	44 %	27 km/h	0.0 mm	Moderate 19
18 Apr	34.8 °C	52 %	24 km/h	1.3 mm	Moderate 12
19 Apr	34.9 °C	50 %	26 km/h	2.7 mm	Low 7
20 Apr	33.5 °C	53 %	26 km/h	0.5 mm	Moderate 14
21 Apr	34.3 °C	44 %	31 km/h	0.0 mm	Moderate 20
22 Apr	34.9 °C	42 %	26 km/h	0.0 mm	Moderate 20
23 Apr	34.1 °C	47 %	27 km/h	0.0 mm	High 22
24 Apr	34.7 °C	42 %	23 km/h	0.0 mm	Moderate 21
25 Apr after	35.3 °C	42 %	28 km/h	1.0 mm	Moderate 19

Before and after, from space

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

↔

Before · 1 Apr 2026

After · 1 May 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 17 April 2026 the air beside the fire reached 77 µg/m³ of PM2.5. That day averaged 39: 2.6 times the WHO daily guideline (15).

PM2.5 peak77 µg/m³

Days over the guideline22 days

PM1079 µg/m³

Optical depth1.06

WHO 15

6789101112131415161718192021222324252627

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 · 97Every 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 Vietnam ›

Frequently asked questions

How long did the Hon Dat fire last?: GWIS (Copernicus) dates it between 8 April 2026 and 24 April 2026: 17 days between the first and last heat detection of the perimeter.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,162 hectares (31.6 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire entered 2 municipalities: Hon Dat (3,129 ha, 3.0 %); Tan Hiep (52 ha, 0.1 %).
What was the weather like?: During the fire the temperature reached 35.5 °C, humidity dropped to 42 % and gusts hit 38 km/h. The fire danger index (FWI) reached 22, class High.
Where does this data come from?: From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Vietnam (geoBoundaries). 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: 114

Satellite cross-check

NASA FIRMS ↗
GWIS · Copernicus ↗

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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Dates or duration Place or towns Burned area Name It was not a wildfire Same fire as another page Something else

What really happened?

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We will only use your email to reply about this report. Privacy. This is not an emergency service: if there is a fire now, call 114.

Where this data comes from

The perimeter comes from the Copernicus Global Wildfire Information System (GWIS), which rebuilds it from MODIS and VIIRS heat detections and publishes it under CC BY 4.0. It is not measured on imagery as in Europe, so it is an estimate. Heat detections come from the VIIRS sensors aboard Suomi-NPP and NOAA-20, distributed by NASA FIRMS at 375 m resolution. Municipal boundaries come from geoBoundaries ADM2 (Creative Commons Attribution 3.0 Intergovernmental Organisations (CC BY 3.0 IGO)). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ from each country’s official figure.

Where it burned