wildfires

Map showing the NDVI anomaly in 2024 compared to average levels from 1991 to 2020). After a couple of years of above average precipitation in Southern California, vegetations levels in the summer of 2024 were 30% greener than average. Map: NASA, public domain.

Hydroclimate Whiplash: the Impact on California Wildfires

Caitlin Dempsey

Hydroclimate whiplash - the rapid swing between drought and heavy precipitation - plays a role in the increasing intensity of California wildfires.

Taken at about 30,000 feet (9 kilometers) over eastern Washington, the smoke plume (gray) feeds the pyrocumulonimbus cloud (white). Photo: David Peterson (U.S. Naval Research Laboratory), public domain, August 8, 2019.

Understanding the Increase in PyroCbs: Wildfire Thunderstorms

Caitlin Dempsey

Wildfire-driven thunderstorms, known as pyroCbs (pyrocumulonimbus clouds), are becoming more frequent.

A giant sequoia tree at Yosemite National Park's Mariposa Grove of Big Trees.

Geography of Giant Sequoias

Elizabeth Borneman

Giant sequoias are one of the longest lived tree species, with the oldest giant sequoia living an estimated 3,400 years.

Southern California neighborhood scarred by wildfire. Photo: Jon Keeley, USGS Western Ecological Research Center. Public domain.

Study: More U.S. Homes Burn in Grassland and Shrubland Fires than Forest Wildfires

Caitlin Dempsey

A new study in Science reports that in the United States, grassland and shrubland fires tend to be more extensive and burn more houses than forest fires.

Fire and embers glow orange on the floor of a conifer forest at twilight.

Mapping Wildfire Movement

Caitlin Dempsey

The Fire Events Data Suite is being used to map near real-time wildfire behavior including fire perimeters, active front, and total burned areas.

Satellite imagery of a wildfire burning in Canada with smoke streaming from the area.

Wildfires in Canada

Caitlin Dempsey

Canada's boreal forests are facing a strong start to the 2023 wildfire season in Alberta and British Columbia.

A satellite image of a wildfire burning across Oregon.

2023 Wildfires in the Western United States

Caitlin Dempsey

So far in early August of 2023, the wildfire season in the western United States has not been as intense as prior years when a years-long drought was raging.

A tree burning in the North wildfire in Sequoia and Kings Canyon National Parks in 2004.

Causes of Wildfires in the United States

Caitlin Dempsey

Every year, thousands of wildfires rage across the United States, consuming millions of acres.

Annotated satellite image showing a coastal low and wildfire smoke over the northeastern part of the United States.

Wildfire Smoke From Canada is Affecting Parts of the United States

Caitlin Dempsey

Smoke from the June 2023 Canadian wildfires is affecting the Midwest and northern regions of the United States.

Satellite image of wildfires burning in New Mexico in May 2022. Smoke can be see flowing from the site of three wildfires near Santa Fe.

Early Wildfires in New Mexico

Caitlin Dempsey

Wildfires in New Mexico are are starting earlier each year due to warmer and drier conditions.

A cabin in a wildland-urban interface. Photo: Glacier National Park, National Park Service, public domain.

The Wildland-Urban Interface is Growing in the United States

Julian Marks

More people in the United States are moving from urban areas into more natural landscapes.

Cover of the book, "Drought, Flood, Fire: How Climate Change Contributes to Catastrophes."

Review | Drought, Flood, Fire: How Climate Change Contributes to Catastrophes

G.T. Dempsey

"Drought, Flood, Fire: How Climate Change Contributes to Catastrophes" is written by a scientist who understands how to meaningfully inform his non-scientist readers.  

Satellite image showing the McKay Creek fire (left) and the Sparks Lake fire (right) on June 20, 2021 in British Columbia, Canada.

2021 Wildfires in the U.S. and Canada

Caitlin Dempsey

Climate change is causing wildfires to burn longer and more frequently in some northern latitudes.

Natural color images from the NOAA-NASA Suomi NPP satellite of fires burning in Colorado. Image: NASA, August 15, 2020, public domain.

Three of Colorado’s Wildfires are the Largest in Recorded History for the State

Caitlin Dempsey

Widespread drought and heat waves are helping to fuel a record-breaking fire season in Colorado.

How to View Animated Satellite Imagery of the California Wildfires

Caitlin Dempsey

Users can quickly make animations of the California wildfires using imagery from NOAA's GOES-West satellite.

Satellite imagery showing smoke from the California wildfires on September 2, 2020. Image: the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite, public domain.

Smoke from the California Fires Over the Pacific Ocean

Caitlin Dempsey

NASA’s Terra satellite captured this image of smoke from the August Complex fire and other fires burning in California as it blows out over the Pacific Ocean.

PurpleAir provides crowdsourced air quality measurements.

Track Real-Time Air Pollution With this Crowdsourced Map

Caitlin Dempsey

One way to track air quality at the local level is by visiting PurpleAir, an interactive map that pulls in crowdsourced data.

Taken at about 30,000 feet (9 kilometers) over eastern Washington, the smoke plume (gray) feeds the pyrocumulonimbus cloud (white). Photo: David Peterson (U.S. Naval Research Laboratory), public domain, August 8, 2019.

Smoke from Australian Wildfires Reaches Atmospheric Highs

Elizabeth Borneman

Smoke from the 2019 wildfires not only impacted Australian population centers but drifted far into the atmosphere as well.

Landsat 8 imagery of Kangaroo Island showing damage from wildfires. Acquirered January 9, 2020.

Satellite Imagery Shows Fire Damage to Australia’s Kangaroo Island

Caitlin Dempsey

Like parts of mainland Australia, Kangaroo Island has been devastated by bushfires fueled by drought and intense temperatures.

View From Space: Australia’s Wildfires

Caitlin Dempsey

The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite acquired a natural-color image acquired this image of smoke rising from wildfires burning in New South Wales (NSW) and Queensland.

Smoke from the Camp Fire is Making Northern California Air Among the Unhealthiest in the World

Caitlin Dempsey

The continual arrival of smoke from the Camp Fire has pushed cities in the northern California area to air pollution levels to some of the highest around the world.

Largest Fires in California’s History

Katarina Samurović

In California, the officially hottest month on the record- July - was topped with the most severe wildfire season that Californians have ever witnessed. 

The new Firelight Detection Algorithm (FILDA) detects the start of a fire 11 hours earlier than the standard algorithm, Active Fire Application Related Product (AFARP). Maps: Joshua Stevens, using data from Polivka, T. N., et al. (2016).

A New Algorithm to Find Wildfires When It’s Cloudy

Elizabeth Borneman

New technology called the Firelight Detection Algorithm, or FILDA, can help detect wildfires at night even when the skies are cloudy.

Changes in fire season length from 1979 to 2013. Map by Joshua Stevens, using data provided by Matt Jolly, USDA Forest Service.

Fire Seasons Becoming Longer and More Frequent

Elizabeth Borneman

Research on fire seasons indicates that around 25% of Earth’s vegetated surfaces now experience a longer fire season.