Wildfire Facts, Their Damage, and Effect on the Economy
The frequency of western U.S. wildfires has increased by . California, Colorado, Arizona, and New Mexico experience the worst damage. These fires have burned six times the land area as before and last five times longer. Their fierce temperatures consume all nutrients and vegetation, leaving little to grow back.
The other areas at risk are forests in Canada, Scandinavia, and Russia. Recent wildfire intensity and frequency are in the past 10,000 years.
The fire season itself is also two months longer than in the early 1970s, . That allows more time for fires to erupt. In California, . Since 2012, there has not been a month without a . Before then, fire officials could use the fall and winter to plan and regroup.
2019 Fire Season
As of April 5, 2019, there were 7,091 U.S. wildfires. That's less than the 11,195 wildfires in the same period in 2018, according to the . About 171,207 acres were burned in the 2019 period, compared with 432,420 in 2018.
In March 2019, in Washington state created 50 wildfires. Meteorologists said this level of activity doesn't usually begin until August.
2018 Fire Season
In 2018, more than burned 8.8 million acres. The wiped out the town of Paradise. It killed 85 people, making it the deadliest in California history. Another . The fire is also the most destructive. It burned 153,336 acres and destroyed 18,733 buildings. It was the world's causing $16.5 billion in damage.
At the same time, the burned 96,949 acres, threatening Thousand Oaks and Malibu. Three people died and 1,500 structures were destroyed. These two fires forced to leave their homes. They are living in temporary shelters, but more permanent housing solutions are rare in high-priced California.
In August, at least . They require 28,250 firemen to combat them. At the same time, eight wildfires were burning across Colorado and six in Utah. The drifted to New York and parts of New England.
In July, the became the largest in California history. It burned 459,123 acres. The . The extreme heat at the fire's center created a wind shear that causes the air to spin. As of September 6, 2018, the damage was in insurance claims.
2017 Fire Season
In 2017, there were 71,499 fires that burnt 10 million acres. It cost $2.9 billion to put them out, the most in history. The Thomas fire was the worst in California. It burned 283,800 acres in December. The Wine Country fires in 2017 cost $10.4 billion in claims.
that they pushed smoke into the Earth's stratosphere. It circled the globe within two weeks and remained there for months. The impact is comparable to a moderate volcanic eruption.
The deadliest wildfire in U.S. history was the 1871 Peshtigo fire in Wisconsin. It killed 1,500 people, according to the .
In 2018, California suffered $400 billion in damage, . It cost the California fire department $1 billion. Both are new records.
In 2017, the U.S. Forest Service spent almost $2.9 billion to put out fires nationwide. That's more than the $2.1 billion spent in 2015. Firefighting consumed 52% of its budget. It leaves little for forest management, capital improvements, and research. At the peak of the season, and 1,900 fire engines were deployed. The Air National Guard had to help, dropping 530,000 gallons of fire retardant.
The biggest reason for the cost increase is that fires are getting bigger. As of November 24, 2017, the average size was almost 175 acres. The prior record, in 2015, was slightly more than 140 acres. Before 2005, fires burned less than 100 acres.
Another reason is that 33% of houses are near a forest. They increase the cost of wildfire protection. In 2015, wildfires caused .
A that home-insurance premiums have risen in the state’s most fire-prone areas. The study estimated that the number of acres burned in the Sierra foothills will double in the next 30 years. It will quadruple by 2100.
The California utility . It faced $30 billion in fire-related liability costs. that old PG&E equipment caused 17 wildfires. It didn't keep up with maintaining thousands of miles of aging power line and trimming millions of trees in a service area larger than Florida. The company estimated it would cost to comply with a judge’s maintenance plan. To pay for the plan, it would have to increase rates by five times over a one-year period.
It would have to remove 100 million trees on federal, state, and private property.
it could shut off power to up to 5.4 million customers when needed to prevent sparks. That's 10 times more than those affected by these "public-safety" shutoffs in the past. In December 2018, responsible for the Camp fire.
Munich Re, the world's largest reinsurance firm, for $24 billion of losses in the California wildfires. It warned that insurance firms will have to raise premiums to cover rising costs from extreme weather. That could make insurance too expensive for most people.
There are five reasons for the growing severity of wildfires. They are rising temperatures, shorter winters, more pests, drought, and fire suppression. The first four are caused by climate change.
Rising temperatures increase evaporation. The atmosphere draws more moisture from soils, . For example, Redding, California, before the Carr fire struck. But even if the soil is moist, heat waves can enough to create flammable tinder. Wildfires are driven more by the temperature and moisture content in the air than by the moisture content in the soil. Scientists thought that wildfires were strictly a function of drought.
Shorter winters mean there is less snow. That releases a smaller amount of melting snow in the spring. That also dries the soil and vegetation.
A shorter winter also means that many pests, such as the pine bark beetle, don’t die off in the winter. As a result, they are killing and weakening millions of trees. The that 100,000 beetle-infested trees fall daily. This level of damage has never before been seen in U.S. recorded history. It provides dry fuel for forest fires.
is a reduction in precipitation over an extended period. It’s most people's biggest climate change worry, according to a . In 2012, more than 80% of the United States experienced abnormally dry conditions.
through a vicious cycle. Greenhouse gas emissions trap heat, causing air temperatures to increase. The hot air absorbs more moisture, resulting in less rain. Hotter air also increases evaporation from lakes and rivers, reducing water sources. Without rainfall, the plants that retain moisture in the soil die. The bare earth creates even drier conditions. When it does rain, water just runs off without absorbing into the water table. Dead vegetation, warmer air, and decreased rainfall also increase the frequency and severity of wildfires.
In the 1880s, encouraged more young trees similar to forests in the East or in Europe. They allowed ranchers' livestock to overgraze the grass to eliminate the source of ground fires and allow more seedlings to survive. The forests grew unnaturally dense.
In the 1920s, foresters put out fires and allowed even more trees to grow. But there weren't enough nutrients to support them, so they grew thin and weak. Bark beetles took advantage of the weak trees, killing them. As a result, forest fires grew monstrous on the dense, dry wood.
predicted that the number of wildfires “ as the climate warms.” They warned this could create “profound changes to certain ecosystems.”
For example, Alaskan tundra and forest wildfires would increase under warmer and drier conditions. The result would be " in the last 10,000 years." The scientists predict that the total area burned would increase between 25% and 53% by 2100.
The study predicted that wildfires in the Greater Yellowstone will greatly increase by 2050. Years without large fires will become extremely rare. In the West, fires greater than 50,000 acres will increase. An additional could burn each year by 2100. Even the Southeast will start to see an increase in large wildfires.
Wildfires increase greenhouse gases as the fires burn carbon stored in the trees and plants. For example, in 2015 released twice as many greenhouse gases as Germany emitted in 2014. Once destroyed, those trees are no longer around to absorb carbon dioxide from the air.
By 2030, the . By 2050, the American Southwest and Great Plains will experience a , according to scientists at Cornell University. The drought will last 50 years. It will be similar to droughts that occurred in the region during the 12th and 13th centuries, but it will be entirely man-made, a consequence of global warming.
By 2030, wildfires could destroy . That's in addition to the 20% that's already been destroyed. The Earth will lose a large part of its ability to absorb greenhouse gases.
Solutions to Wildfires
Government policies can solve the short-term wildfire problem. In forest fire regions, there should be no planting of easily flammable tree species such as eucalyptus and pine. For example, Portugal suffered tremendous wildfires after it allowed farmers to plant fire-prone eucalyptus to replace fire-resistant cork oaks.
Governments should not allow human development in pristine forests. New forest roads increase the likelihood of human-caused fires.
Medium-term, governments can promote policies that conserve water. These include waste-water recycling, desert landscaping, and . They should also reverse subsidy policies that encourage thirsty crops like cotton. Instead, they should direct subsidies .
Foresters should allow loggers to thin the forests, removing spindly and weak trees. The largest, sturdiest trees should remain to provide seeds for future generations. These trees will survive weaker fires, as they had for centuries before humans managed the forests. On December 21, 2018, President Donald Trump issued an executive order on government grounds by 31%. But loggers could just remove the big trees and leave the smaller ones.
Long-term, the government must stop climate change to reduce wildfires. Nations must cap the amount of greenhouse gas emitted into the Earth's atmosphere. Once that is done, carbon emissions trading can encourage businesses to adhere to the cap. A carbon tax can punish them if they do not.