Most US fire departments are staffed entirely by volunteers, though they tend to serve smaller communities

Volunteer fire departments are declining as communities shift to career staff

As populations increase and emergency calls grow more complicated, many communities are replacing volunteer fire departments with full-time professional staff—a change that boosts response capacity and reliability but also significantly raises costs.

Fire districts and fire departments are governed differently

A fire department is usually a municipal agency under the control of city or county authorities. In contrast, a fire district functions as an independent special district with its own elected board, separate budget, and taxing authority.

The Federal Emergency Management Agency leads the US response to disasters

Established in 1979, FEMA coordinates the government's response to hurricanes, wildfires, floods, and other disasters, providing funding, logistical support, and recovery assistance. In FY 2024, the agency spent $35.1B, nearly 40% of the Department of Homeland Security's total budget.

A third of Americans now live in wildfire risk zones

Climate change and human development into fire-prone regions have extended the wildfire season, with some areas experiencing fire conditions year-round. Extreme conditions, poor compensation, and exposure to carcinogens have complicated firefighter recruitment, further exacerbating wildfire risks.

America's first trained EMT service was established in Pittsburgh's inner city

Watch this documentary about the Freedom House Ambulance Service—the foundation for all paramedic training in America. Founded in 1967, this emergency care force composed of Black men and women from Pittsburgh sought to respond to Pittsburgh's Black community emergencies when the Black community couldn't rely on the police and fire departments to consistently respond to their emergency calls.

Local governments are responsible for more than 148,000 public water systems across the US

From large municipal utilities to small rural systems, local governments are tasked with providing clean water to almost every American community. The US operates over 148,000 public water systems.

Most common jobs in the US

Most US government organizations list roughly 500 primary occupations that most Americans fall into, such as teachers and cashiers. Using data from the 2018 through 2022 American Community Survey, these graphics break down the most common jobs in the US by age, gender, and more. See the graphics here.

The National Guard serves both state governors and presidents

Roughly 430,000 trained military personnel act as a strategic reserve for the US military, deployed domestically during natural disasters or unrest as well as overseas. It consists of the Army National Guard and the Air National Guard, overseen at the federal level by the National Guard Bureau.

A history of raising the alarm, from rattles to 911

Because fires spread so quickly, communities around the world have deployed many tactics to raise the alarm to get help. This history from the Museum of Natural History dives into the use of rattles, bells, and brigades to gather help to fight fires, showing just how far we've come since 911 was introduced in 1968.

Fire engines are among the most complex vehicles on the road

These vehicles are purpose-built to carry water, foam, hoses, ladders, and lifesaving equipment to a scene in minutes. This animated video pulls apart every system inside a pumper truck, showing exactly how the machinery that fights fires actually works.

The United States is one of only around two dozen countries with a fully federal system of government, in which power is divided between national and state governments.

Rural emergency rooms are sometimes operating without any physicians on-site

These facilities may not have an on-site doctor at all, with norms varying widely by state. In North and South Dakota, more than half of their emergency departments were running without 24/7 attending physician staffing, according to recent research. Instead, they're staffed by physician assistants and nurses.

In 2024, 15% of US laborers worked remotely

At the time, Frisco, Texas, had the highest share of remote workers among large US cities, at 34% (or 42,000 people). Frisco was closely followed by Berkeley, California, at 32% (18,000 people).

11 people died from firework injuries in the US in 2024

Most of those deaths involved misuse of the explosives and device malfunctions or misfires. That fatality count doesn't include the almost 15,000 people who received treatment in the emergency room due to firework-related injuries. More than a third of all the injuries in 2024 were burns, underscoring the risks of using these explosive devices.

There are five main types of FIRE

Many different types of FIRE exist, and their methodologies and end goals vary drastically. “Lean FIRE” followers, for instance, are minimalists who plan to live modestly in retirement. “Barista FIRE” proponents plan to work part-time in retirement.

43% of Americans don't have savings to pay for a $1K emergency

That's according to data from January 2026 shared by US News. Among those who did have an emergency fund, the median balance was $5K.

The United States faces a sizeable teacher shortage

Teacher vacancies have surged since 2017, with each year opening more positions than hires. Educators are quitting in record numbers, citing low pay and burnout. Today, there are 567,000 fewer education professionals than before the pandemic.

Roughly 40% of basic US research is federally funded

Basic research aims to produce new knowledge for it's own sake, as opposed to applied research, which seeks direct application. Private businesses make up the bulk of the rest of the funding.

Voter turnout in local elections is significantly lower than for national elections

While 64% of eligible voters cast ballots in the 2024 presidential election, turnout in municipal elections is usually below 15%. For school board elections—where members oversee more than 50 million students and $600B in spending—turnout is often around 5%-10%.

Fireworks-related ER visits are on the rise—in 2024, they increased by 52% as compared to the prior year.

Nuclear power supplies almost half of US carbon-free energy

As of 2023, nearly 20% of US electricity comes from nuclear power, but most reactors were built from 1971 to 1990. Expansion slowed due to safety concerns, high costs, and competition from natural gas.

Virtually all public libraries in the US offer free internet access

Beyond providing internet access, libraries have also expanded into broad digital hubs for communities. Ninety percent offer basic digital literacy training, 76% help patrons navigate online government services, and 73% assist people with job applications.

Half of Americans have an unfavorable opinion of the IRS, while 38% have a favorable view

From July 1 to July 7, 2024, Pew Research Center conducted a survey of 9,424 adults to gauge the public's attitudes about the federal government, including government agencies and departments. Of 13 agencies, 10 had net favorable ratings of 15 percentage points or more. Topping the list were the National Park Service (76% favorable), the US Postal Service (72%) and NASA (67%).

Approximately 180,000 African Americans served in Union forces

About 180,000 Black soldiers—roughly 10% of the Union army—served in the United States Colored Troops after 1863. Despite lower pay and discrimination, they were crucial to the Union victory.

Police officer salaries vary dramatically depending on where officers serve

Officer pay varies significantly across states and cities, with the highest salaries in California, New Jersey, and Washington. Factors such as local funding, cost of living, and collective bargaining agreements influence compensation.

The US air traffic control system is safe but due for major technological updates

On any given day, over 3 million passengers fly on roughly 45,000 flights in the US. Flying today is safer than ever, but air traffic controllers deal with outdated technology that can interfere with pilot communication.

More than 500,000 people worked to contain Chernobyl's fallout

The group—collectively referred to as "liquidators"—included firefighters, military troops, miners, engineers and sanitation crews. Beyond clearing radioactive debris and performing decontamination work, they confined radioactive material to prevent its spread into groundwater.

The USPS spent $3.97B in 2024, accounting for .058% of the federal budget.

Experimental hantavirus vaccines and therapies, still under development, have long been funded by the US military.

44% of Americans say they pray at least once a day—discover how your state's religiosity stacks up against the rest of the country.

Discover the catastrophic consequences of a failure of the US electrical grid—something that is more likely than many Americans think.

Roughly 43 million US borrowers owe roughly $1.7T in student debt, the second-largest source of consumer debt behind mortgages.

The price of gas is a composite made up of several different factors, with the federal gas tax making up less than 20% of what drivers pay at the pump.

The American Society of Civil Engineers' infrastructure report card gave the US a C in 2025, its highest grade since the project launched in 1998.

The use of fungi to detoxify land and water—a process known as mycoremediation—has been used to clean up natural resources affected by the 2025 California wildfires.

Most of the observable universe's volume consists of voids and supervoids—enormous regions of space with little to no galaxies, stars, or light.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

The deadliest aspect of volcanic eruptions is often not lava, but pyroclastic flows—avalanches of ash, gas, and rock that can move more than half the speed of sound.

About 12.5% of US adults experience a phobia in their lifetime, a diagnosis that hinges on the intense fear interfering with daily life and persisting for at least six months.

Up to a million Girl Scouts sell about 200 million cookie boxes every spring, generating $800 million, largely because refusing a child is frowned upon

Massive 3D printers have been used to build homes by stacking layers of 'concrete toothpaste,' a fire-resistant material that effectively insulates against outside noise.

Louisiana's 'Cancer Alley' is infamous for having some of the highest industrial pollution, toxic air emissions, and cancer risks in the US.

Venture capital is a form of funding provided to early-stage companies with high growth potential, typically in exchange for an equity (or ownership) stake

Iran's Revolutionary Guard Corps is independent of Iran's regular army and is one of the most powerful and influential military-political organizations in the Middle East.

The US first hosted the World Cup in 1994, a tournament that lives in soccer infamy for its poor planning and the murder of Colombian player Andres Escobar, who'd accidentally scored on his own net.

A 2019 Facebook event called on attendees to "Storm Area 51, They Can't Stop All of Us," resulting in countless memes, the creation of a music festival, and eventually the arrests of those who did try to approach the area.

Many legends about George Washington, including his supposed wooden teeth and the story of cutting down the cherry tree, lack evidence.

Bone marrow (soft tissue found inside certain bones) generates roughly 500 billion new blood cells each day

Domino's Pizza's 30-minute delivery guarantee was responsible for the chain's 1980s surge, but it was discontinued after the company was found liable for delivery driver accidents.

The 19th-century painters of the Hudson River School were among the first American romantics, with portraits that displayed the natural beauty of the young country.