How Thermal Imaging Supports Wildfire Detection and Monitoring

Wildfires are not always visible in the way people expect.

Flame fronts may attract the most attention, but many operational risks during bushfires exist outside the visible fire edge. Residual heat, spot fires, smouldering vegetation and heat movement beneath smoke can all create challenges for emergency services attempting to understand changing conditions across large firegrounds.

This is one of the reasons thermal imaging has become such an important part of modern wildfire operations.

Across Australia, the United States and Europe, thermal intelligence is increasingly being used to support:

• wildfire detection

• operational monitoring

• aerial reconnaissance

• fire edge visibility

• hotspot identification

• situational awareness

• post-fire assessment

Importantly, thermal imaging is not replacing traditional firefighting operations.

Its value lies in improving operational understanding during conditions where visibility or situational awareness may otherwise be limited.

What Is Thermal Imaging?

Thermal imaging detects heat energy rather than visible light.

Unlike standard optical cameras, thermal systems can identify temperature differences across landscapes, vegetation and firegrounds. This allows operators to observe heat signatures that may not be clearly visible to the human eye.

In wildfire operations, thermal imaging may assist with:

• identifying active fire edges

• locating hotspots

• detecting spot fires

• monitoring heat intensity

• observing fire movement beneath smoke

• identifying residual heat after suppression activity

Thermal systems are now widely used internationally across both aerial and ground-based wildfire operations.

Why Thermal Visibility Matters During Wildfires

Smoke is one of the biggest operational challenges during major fire incidents.

Dense smoke can significantly reduce visibility for:

• ground crews

• incident management teams

• aerial observers

• suppression aircraft

• evacuation operations

This becomes especially difficult during:

• night operations

• wind changes

• heavy smoke column development

• complex terrain environments

• large fire complexes

Thermal imaging helps improve visibility in these environments by allowing operators to observe heat activity even where smoke obscures visual conditions.

This can provide valuable operational context during rapidly changing incidents.

Thermal Imaging and Spot Fire Detection

One of the most significant operational risks during bushfires is spotting activity.

Spot fires occur when embers travel ahead of the main fire front and ignite new areas, sometimes kilometres away from the original fire edge under severe conditions.

These spot fires can:

• threaten containment lines

• endanger communities

• create new operational sectors

• increase pressure on response resources

In heavily timbered or smoke-affected environments, spot fires may not be immediately visible from the ground.

Thermal imaging can help identify:

• emerging heat signatures

• isolated ignition points

• active hotspots outside the main perimeter

This capability becomes particularly important during extreme fire weather events where fire spread may accelerate quickly.

Australia’s Bushfire Environment and Thermal Intelligence

Australia’s bushfire conditions create several operational challenges that make thermal intelligence particularly valuable.

These include:

• dense forest fuels

• remote terrain

• fast-moving grassfires

• heavy smoke conditions

• prolonged fire campaigns

• large firegrounds

Following the Black Summer fires of 2019–2020, Australian agencies increasingly focused on improving:

• operational visibility

• real-time intelligence

• aerial situational awareness

• fireground mapping capability

Thermal imaging has become an increasingly important component of that broader intelligence environment.

It is now commonly used to support:

• aerial reconnaissance

• night observation

• hotspot assessment

• containment monitoring

• operational planning

The emphasis internationally is shifting toward integrating thermal data into wider operational awareness systems rather than treating it as a standalone technology.

Lessons from the United States

The United States has been a major driver of thermal intelligence integration within wildfire operations.

Large and prolonged wildfire incidents across California and the western United States have accelerated the use of:

• infrared mapping

• thermal reconnaissance

• night intelligence operations

• aerial heat detection

The USDA Forest Service and associated agencies have long used infrared operations to support wildfire mapping and operational awareness during large incidents.

These systems are particularly valuable during:

• night operations

• inaccessible terrain

• large fire complexes

• smoke-obscured environments

Thermal intelligence helps incident management teams maintain a clearer understanding of changing fire conditions during periods where traditional visual observation may be limited.

Greece and Southern Europe: Visibility Challenges in Complex Terrain

Thermal imaging is also becoming increasingly important across Southern Europe.

In Greece particularly, recent wildfire seasons have highlighted the operational difficulty of monitoring fast-moving fires in:

• mountainous terrain

• dense vegetation

• coastal interfaces

• island environments

Strong winds and rapidly shifting fire behaviour can create situations where operational visibility changes very quickly.

Thermal systems can help improve understanding of:

• active fire intensity

• isolated heat zones

• residual hotspots

• fire spread beneath smoke

As wildfire conditions intensify across Mediterranean regions, agencies are placing greater emphasis on technologies that improve operational awareness during rapidly escalating incidents.

Thermal Imaging Is About Operational Understanding

One of the misconceptions about thermal imaging is that it automatically provides answers.

In reality, thermal intelligence is most valuable when combined with:

• operational experience

• aerial reconnaissance

• mapping systems

• field reporting

• weather intelligence

• situational awareness processes

Heat signatures still require interpretation.

Not every hotspot represents the same operational risk, and thermal data must be understood within the broader fireground context.

As Joshua Brookes Allen, Chief Engineer at Airview Fire Recon, explains:

“Thermal imaging becomes most valuable when it helps simplify operational understanding. The goal is not to overwhelm incident teams with more information, but to help clarify where attention is needed most.”

That distinction is increasingly important as agencies manage growing volumes of operational data during major incidents.

Supporting Safer and More Effective Operations

Thermal intelligence can support wildfire operations in several important ways.

It may help improve:

• hotspot visibility

• perimeter awareness

• operational coordination

• mapping accuracy

• post-suppression assessment

• situational awareness during low-visibility conditions

This becomes particularly important during:

• extended attack operations

• overnight monitoring

• containment verification

• complex terrain incidents

• large-scale fire events

The faster conditions change, the more valuable accurate operational visibility becomes.

Looking Ahead

Thermal imaging will likely continue playing a larger role in wildfire operations internationally.

Across Australia, the USA and Europe, agencies are increasingly investing in:

• aerial intelligence capability

• thermal mapping systems

• reconnaissance platforms

• integrated operational awareness

As wildfire incidents become larger and more dynamic, the ability to observe heat activity quickly and accurately will become increasingly important.

But the future of thermal intelligence is unlikely to be about technology alone.

Its real value lies in how effectively it supports operational understanding during fast-moving incidents.

Because during major wildfires, clearer visibility often leads to better decisions — and better decisions can make a significant operational difference.