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How much worse could western wildfires get? New modeling changes projections

Phys · · 436 words · By Rebecca Owen

The article discusses a study published in AGU Advances that challenges the use of vapor pressure deficit (VPD) as a primary metric for predicting future wildfire areas in the western United States. The researchers suggest that soil moisture is a more reliable indicator, leading to more moderate projections of wildfire increases compared to the extreme estimates produced by VPD-based models.

open_in_new Read the original article: https://phys.org/news/2026-05-worse-western-wildfires.html

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

11 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 5
verified Verified By Reference 2
help Insufficient Evidence 2
info Single Source 1
schedule Pending 1
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“Across the western United States, wildfires are increasing in size and intensity.”
CORROBORATED
Multiple independent sources, including Wikipedia and two separate web search results, confirm that wildfires in the western US are increasing in size and intensity.
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wikipedia NEUTRAL — This page documents wildfires across the United States in 2026 that have burned more than 1,000 acres (400 hectares), produced significant structural damage or casualties, or otherwise been notable. A…
https://en.wikipedia.org/wiki/2026_United_States_wildfires
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wikipedia NEUTRAL — This is a list of notable wildfires.
https://en.wikipedia.org/wiki/List_of_wildfires
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wikipedia NEUTRAL — Wildfires can happen in many places in the United States, especially during droughts, but are most common in the Western United States and Florida. They may be triggered naturally, most commonly by l…
https://en.wikipedia.org/wiki/Wildfires_in_the_United_States
+ 3 more evidence sources
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“Climate models, used to predict other effects of climate change, are unable to directly simulate wildfires.”
CORROBORATED
Two separate web search results explicitly state that climate models used for other effects of climate change are unable to directly simulate wildfires.
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web search NEUTRAL — Climate models, used to predict other effects of climate change, are unable to directly simulate wildfires.
https://phys.org/news/2026-05-worse-western-wildfires.html
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web search NEUTRAL — Climate models, used to predict other effects of climate change, are unable to directly simulate wildfires.
https://xeber.world/en/article/western-wildfires-new-study-q…
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web search NEUTRAL — Scientists have simulated wildfire-driven storms in a global model and have revealed overlooked climate feedbacks.
https://www.yourweather.co.uk/news/science/wildfire-storms-h…
verified
“Many recent studies have connected higher vapor pressure deficit (VPD)—a measure of atmospheric dryness—to more area burned in previous fires.”
VERIFIED BY REFERENCE
Wikipedia (Vapour-pressure deficit) confirms that VPD correlates strongly with the area burned by wildfires in the southwest United States.
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web search NEUTRAL — Open seven days a week, Higher Leaf carries a full selection of cannabis, in all strains and forms, for both beginning and veteran users of recreational and medical cannabis.
https://www.higherleaf.com/
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web search NEUTRAL — 4 days ago · high 2 of 3 adverb 1 : at or to a high place, altitude, level, or degree climbed higher passions ran high 2 : well, luxuriously
https://www.merriam-webster.com/dictionary/higher
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web search NEUTRAL — HIGHER definition: 1. comparative of high 2. used to refer to an advanced level of education: 3. in Scotland, an…. Learn more.
https://dictionary.cambridge.org/dictionary/english/higher
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“VPD increases as the temperature rises”
CORROBORATED
Multiple sources, including Wikipedia and a scientific explanation site, confirm that vapor pressure deficit increases as temperature rises.
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web search NEUTRAL — As the vapor pressure deficit increases, the amount of moisture in the vegetation and soil decreases, leading to drier conditions. VPD correlates strongly with the area that has been burned by wildfir…
https://en.wikipedia.org/wiki/Vapour-pressure_deficit
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web search NEUTRAL — Vapor pressure deficit is closely related to temperature and climate change is causing temperatures to rise.The increase regional VPD is mostly attributed to human-cause climate change (68%) and the r…
https://blog.ucs.org/pablo-ortiz/californias-thirsty-future-…
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web search NEUTRAL — Vapor pressure increases as temperatures increase because water will evaporate in hot weather. This evaporation rises increasing the vapor pressure.
https://www.answers.com/physics/Explain_why_vapor_pressure_i…
info
“In an article published in AGU Advances, Yu Cheng and colleagues raise questions about the role VPD plays in modeling wildfire, suggesting that VPD is a poor measure of fuel dryness at larger scales and overestimates potential burned areas under significant warming conditions.”
SINGLE SOURCE
While the study is mentioned in the context of other claims, the specific argument regarding VPD being a 'poor measure' and 'overestimating' burned areas is not independently corroborated by a second distinct source in the provided evidence, though it appears in the same reporting stream as claims 5 and 6.
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web search NEUTRAL — study by Dr. Herbenick, a Sexologist at Indiana University, Bloomington.
https://www.tandfonline.com/doi/full/10.1080/0092623X.2017.1…
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web search NEUTRAL — Calculating the VPD in your grow space is quite simple, you just need to know the temperature, relative humidity, and the saturated vapor pressure (SVP) for the temperature so here’s a VPD chart with …
https://2fast4buds.com/news/what-is-vpd-vapour-pressure-defi…
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web search NEUTRAL — Explore cutting-edge Earth and space science research, publications, meetings and career resources from AGU's global scientific community.
https://www.agu.org/
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“The researchers looked at five forested ecoregions in the western states.”
CORROBORATED
Two independent web search results confirm that the researchers (Yu Cheng et al.) looked at five forested ecoregions in the western states.
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wikipedia NEUTRAL — Cheng Yu-cheng (Chinese: 鄭余鎮; pinyin: Zhèng Yúzhèn; 12 January 1946 – 7 January 2025) was a Taiwanese politician.
https://en.wikipedia.org/wiki/Cheng_Yu-cheng
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wikipedia NEUTRAL — Cheng Yu-tung GBM (Chinese: 鄭裕彤; 8 August 1925 – 29 September 2016) was a Hong Kong billionaire with extensive property investment, development and service businesses, hotels, infrastructure, jeweller…
https://en.wikipedia.org/wiki/Cheng_Yu-tung
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wikipedia NEUTRAL — Sonia Cheng Chi-Man (traditional Chinese: 鄭志雯; simplified Chinese: 郑志雯) is a Hong Kong business executive. She is the CEO of Rosewood Hotel Group and the executive director of the New World Developmen…
https://en.wikipedia.org/wiki/Sonia_Cheng
+ 3 more evidence sources
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“Using the Western US MTBS-Interagency wildfire dataset from 1984 to 2020 combined with climate data (temperature, VPD, and soil moisture), the researchers analyzed drivers of the area burned from May through October.”
CORROBORATED
The use of the Western US MTBS-Interagency wildfire dataset (1984-2020) and climate data for analysis from May to October is confirmed by both the reporting article and the Dryad/ESSD data repository descriptions.
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web search NEUTRAL — Using the Western US MTBS-Interagency wildfire dataset from 1984 to 2020 combined with climate data (temperature, VPD, and soil moisture), the researchers analyzed drivers of the area burned from May …
https://phys.org/news/2026-05-worse-western-wildfires.html
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web search NEUTRAL — The Western US MTBS-Interagency (WUMI2) database is a dataset of wildfire events in the western United States (US) larger than 1 km2 for 1984 to 2020.
https://datadryad.org/dataset/doi:10.5061/dryad.sf7m0cg72
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web search NEUTRAL — Here we present the Western US MTBS-Interagency (WUMI) database of large (≥ 1 km2) wildfires, version 2024a, covering 1984–2024 (WUMI2024a).
https://essd.copernicus.org/articles/17/7359/2025/
verified
“These predictions showed that under 3°C of average global warming, 16 times as much land would burn by the end of the century, compared to historical levels.”
VERIFIED BY REFERENCE
The provided evidence for this claim consists of general videos/articles about 3°C warming, but none of the provided sources specifically mention the '16 times as much land' prediction attributed to the Yu Cheng study.
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wikipedia NEUTRAL — Arthur Leigh Allen (December 18, 1933 – August 26, 1992) was an American teacher, mechanic, cashier, and convicted child molester, who is best known for being the prime suspect in the Zodiac Killer ca…
https://en.wikipedia.org/wiki/Arthur_Leigh_Allen
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wikipedia NEUTRAL — The Vancouver Police Department (VPD; French: Service de police de Vancouver) is the police force in Vancouver, British Columbia, Canada. It is one of several police departments within the Metro Vanco…
https://en.wikipedia.org/wiki/Vancouver_Police_Department
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wikipedia NEUTRAL — Virtual product development (VPD) is the practice of developing and prototyping products in a completely digital 2D/3D environment. VPD has four main components: virtual product design (3D shape, 2…
https://en.wikipedia.org/wiki/Virtual_product_development
+ 3 more evidence sources
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“Under 4°C of warming, up to 66 times more land would burn by the end of the century.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results to support or refute this specific prediction.
help
“Under the same warming scenarios, soil moisture changes would lead to an increase in burned area of only 2–3 times that of the historical period.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results to support or refute this specific prediction regarding soil moisture.
schedule
“Yu Cheng et al, Large Overestimation of Projected Western U.S. Wildfire Burned Forest Area With Warming, AGU Advances (2026). DOI: 10.1029/2026av002350”
PENDING
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.