The 2007 California wildfire season saw at least 9,093 separate wildfires that charred 1,520,362 acres (6,152.69 km2) of land. Thirty of those wildfires were part of the Fall 2007 California firestorm, which burned approximately 972,147 acres of land from Santa Barbara County to the U.S.–Mexico border. At the peak of the wildfire activity in October 2007, the raging wildfires were visible from space.
The 2008 California wildfire season was one of the most devastating in the state of the 21st century. While 6,255 fires occurred, about two-thirds as many as in 2007, the total area burned— 1,593,690 acres —far exceeded that of previous years.
The United States' contiguous western and especially southwestern region has experienced widespread drought since about year 2000. Below normal precipitation leads to drought, and is caused by an above average persistence of high pressure over the affected area. Changes in the track of extratropical cyclones, which can occur during climate cycles such as the El Niño-Southern Oscillation, or ENSO, as well as the North Atlantic Oscillation, Pacific Decadal Oscillation, and Atlantic multidecadal oscillation, modulate which areas are more prone to drought. Increased drought frequency and severity is also expected to be one of the effects of global warming.
The 2011 Texas wildfires were a series of destructive wildfires in Texas that occurred in the 2011 fire season. During 2011 in Texas, around 31,453 fires had burned 4,000,000 acres or 16,190 square kilometres, 2,947 homes, and over 2,700 other structures. 47.3% of all acreage burned in the United States in 2011 was burned in Texas. The fires had been particularly severe due to the 2011 Southern US drought that covered the state, and was exacerbated by the unusual convergence of strong winds, unseasonably warm temperatures, and low humidity.
The Yarnell Hill Fire was a wildfire near Yarnell, Arizona, ignited by dry lightning on June 28, 2013. On June 30, it overran and killed 19 members of the Granite Mountain Hotshots, a group of firefighters within the Prescott Fire Department. Just one of the hotshots on the crew survived —he was posted as a lookout on the fire and was not with the others when the fire overtook them. The Yarnell Hill Fire was one of the deadliest U.S. wildfires since the 1991 Oakland Hills fire, which killed 25 people, and the deadliest wildland fire for U.S. firefighters since the 1933 Griffith Park fire, which killed 29 "impromptu" civilian firefighters drafted on short notice to help battle the Los Angeles area fire.
The Springs Fire was a wildfire in Ventura County, California in May 2013. Although the fire burned only 15 homes, it threatened 4,000. This threat passed when rain shower from few narrow cold-frontal rainbands moved through the California area because of a low-pressure system off the coast. Some places got more than half an inch of rain.
The 2017–18 North American winter saw weather patterns across North America that were very active, erratic, and protracted, especially near the end of the season, resulting in widespread snow and cold across the continent during the winter. Significant events included rare snowfall in the South, an outbreak of frigid temperatures that affected the United States during the final week of 2017 and early weeks of January, and a series of strong nor'easters that affected the Northeastern United States during the month of March. In addition, flooding also took place during the month of February in the Central United States. Finally the winter came to a conclusion with a powerful storm system that caused a tornado outbreak and blizzard in mid-April. The most intense event, however, was an extremely powerful cyclonic blizzard that impacted the Northeastern United States in the first week of 2018. Similar to the previous winter, a La Niña was expected to influence the winter weather across North America.
A series of 29 wildfires ignited across Southern California in December 2017. Six of the fires became significant wildfires, and led to widespread evacuations and property losses. The wildfires burned over 307,900 acres (1,246 km2), and caused traffic disruptions, school closures, hazardous air conditions, and power outages; over 230,000 people were forced to evacuate. The largest of the wildfires was the Thomas Fire, which grew to 281,893 acres (1,140.78 km2), and became the largest wildfire in modern California history, until it was surpassed by the Ranch Fire in the Mendocino Complex, in the following year.
The 2018 wildfire season was the deadliest and most destructive wildfire season in California history. It was also the largest on record at the time, now third after the 2020 and 2021 California wildfire seasons. In 2018, there were a total of 103 confirmed fatalities, 24,226 structures damaged or destroyed, and 8,527 fires burning 1,975,086 acres (799,289 ha), about 2% of the state's 100 million acres of land. Through the end of August 2018, Cal Fire alone spent $432 million on operations. The catastrophic Camp Fire alone killed at least 85 people, destroyed 18,804 buildings and caused $16.5 billion in property damage, while overall the fires resulted in at least $26.347 billion in property damage and firefighting costs, including $25.4 billion in property damage and $947 million in fire suppression costs.
The 2018–19 North American winter was unusually cold within the Northern United States, with frigid temperatures being recorded within the middle of the season. Several notable events occurred, such as a rare snow in the Southeast in December, a strong cold wave and several major winter storms in the Midwest, and upper Northeast and much of Canada in late January and early February, record snowstorms in the Southwest in late February, deadly tornado outbreaks in the Southeast and a historic mid-April blizzard in the Midwest, but the most notable event of the winter was a record-breaking bomb cyclone that affected much of the Central United States and Canada in mid-March. Unlike previous winters, a developing weak El Niño was expected to influence weather patterns across North America. Overall, however, winter of 2018–19 had many La Niña like conditions, being mild along the mid- and lower parts of the East Coast, the West Coast, and most of the southern Plains. Overall, the meteorological winter of 2018-19 became the wettest on record for the United States.
The Silverado Fire was a wildfire that burned in October and November 2020 in southern Orange County, California northeast of Irvine. The fire started on October 26 around 6:47 AM near Orange County Route S-18 and Silverado Canyon Road, fueled by strong Santa Ana winds gusting up to 80 miles per hour (130 km/h) and low humidity. Orange County Fire Authority Chief Brian Fennessy stated, "The winds were extraordinary even by Santa Ana standards. Fire spread is exceeding more than anything I've seen in my 44 years." The fire initially moved south from Loma Ridge toward the Orchard Hills, Northwood and Portola Springs communities of Irvine before moving southeast through Limestone Canyon and toward the communities of Foothill Ranch and Lake Forest. The fire burned in a path similar to that taken by the 2007 Santiago Fire, mostly through terrain that had not seen significant burning in the 13 years since that fire. 100% containment was announced on November 7, 2020.
A drought developed in the Western, Midwestern, and Northeastern United States in the summer of 2020. Similar conditions started in other states in August 2020, including Iowa, Nebraska and certain parts of Wisconsin and Minnesota. At the same time, more than 90% of Utah, Colorado, Nevada and New Mexico were in some level of drought. Also in drought conditions were Wyoming, Oregon and Arizona.
On September 1–2, 2021, Hurricane Ida affected much of the Northeastern United States as an extratropical cyclone, causing catastrophic river and flash flooding. Widespread flooding affected many areas, shutting down numerous roads, halting public transit, and cancelling hundreds of flights. Several rivers overflowed their banks, flooding farmlands, towns, and homes. Hundreds of cars were abandoned on roadways after being stranded in floodwaters and dozens of high-water rescues were performed. Several flash flood emergencies were issued due to the flooding.
The 2020 Maricopa County wildfires were a series of major and non-major wildfires that took place in Maricopa County, Arizona, from the month of May to the month of October. In the year 2020, Arizona saw one of its worst fire seasons in the states history. Due to the lack of precipitation needed in Arizona, the state fell into an ongoing drought from late 2020 and 2021. High winds were also present during the summer when fire season is mostly active in the state. These factors led to the wildfires in Maricopa County to be destructive and costly.
The 2022 California wildfire season was a series of wildfires throughout the U.S. state of California. By the end of the year, a total of 7,667 fires had been recorded, totaling approximately 363,939 acres across the state. Wildfires killed nine people in California in 2022, destroyed 772 structures, and damaged another 104. The 2022 season followed the 2020 and 2021 California wildfire seasons, which had the highest and second-highest (respectively) numbers of acres burned in the historical record, with a sharp drop in acreage burned.
The 2022 United Kingdom heatwaves were part of several heatwaves across Europe and North Africa. The United Kingdom experienced three heatwaves; the first was for three days in June, the second for three days in July, and the third for six days in August. These were periods of unusually hot weather caused by rising high pressure up from the European continent. There were also more grass fires and wildfires than average, and in August a drought was declared in many regions.
The 1992 Fountain Fire was a large and destructive wildfire in Shasta County, California. The fire ignited on August 20 in an act of probable but unattributed arson, and was quickly driven northeast by strong winds. It outpaced firefighters for two days, exhibiting extreme behavior such as long-range spot fires, crown fire runs, and pyrocumulonimbus clouds with dry lightning. The fire was contained after burning for nine days, though work to strengthen and repair fire lines continued for more than two months.
The 49er Fire was a destructive wildfire in 1988 in Northern California's Nevada County and Yuba County. The fire ignited on September 11 when a man accidentally set brush on fire by burning toilet paper near Highway 49. Driven by severe drought conditions and strong, dry winds, firefighting crews were hard-pressed to stop the fire's advance until winds calmed and humidity levels recovered. The fire burned 33,700 acres throughout the foothills of the Sierra Nevada, impinging on the communities of Lake Wildwood, Rough and Ready, and Smartsville before officials declared it fully contained on September 16.
Since the beginning of March 2023, most of Canada experienced a drought, which was severe across the Prairie provinces and unprecedented in British Columbia. Every province and territory was in drought simultaneously. Common factors across Canada were a quick snow melt, sometimes due to a below-average snowpack, and the warmest May-June period in more than 80 years. Moderate to severe drought conditions from British Columbia to northern Ontario persisted until fall.
In a three-month period from August to October 2023, wildfires in Louisiana have burned more than 60,000 acres (94 sq mi), and forced evacuations across several towns in the state, including Merryville and Singer. First burning on August 22, at least 441 wildfires are active across 17 parishes, and the fires have burned at least 21 buildings, prompting the Federal Emergency Management Agency to approve an assistance grant in Beauregard Parish, Louisiana. At least 100 Louisiana National Guard troops were deployed on standby as several wildfires were contained. The most significant fire, the Tiger Island fire in Beauregard Parish, is the largest wildfire recorded in the state, burning over 50,000 acres.
