10 Strategies Firefighters Use to Fight Wildfires

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iStock

Most Americans know how to stop, drop, and roll. Some even know how to employ a fire suppression blanket and how to properly operate a fire extinguisher. But for the vast majority of people, fire is something you brag about being able to make out of two sticks, or something you cook dinner on top of, or just something you run away from—certainly not something you want to have to fight to put out. This is all probably for the best—battling a wildfire is no straightforward task. The men and women who do run toward an unexpected blaze have been well trained in strategies that can suppress the flames of a wildfire. Below are 10 of the techniques firefighters use to put fires out quickly, completely, and safely.

1. CONTROL LINE

One of the most important components of wildfire suppression, control lines are simply the boundaries—natural or manmade—that firefighters employ to control how and where a fire spreads. A rocky ridge or river can serve as a natural control line, or firefighters can establish a manmade one by, for example, clearing out an extended line of brush. Within this overarching definition, a fire line is when the barrier is scraped down “to mineral soil,” a scratch line is a preliminary line built in a hurry, and a wet line is when the area has had flame retardant or water applied. And when you hear on the news that a fire is "X percent contained," this is generally what they’re talking about—that some percentage of the fire’s perimeter has a control/fire line. Sadly, because fires can sometimes jump the barrier, this means even a 100 percent contained fire can start up again.

2. BURNING OUT

When establishing control lines, digging a small ditch and pulling up some plants isn't always enough. To create a sturdy, fuel-free barrier, firefighters may use small torches to burn the brush just inside a control line. A burnout is one of several ways to bolster a control line and further prevent a blaze from escaping the established boundaries.

3. BACKBURN

A backburn is similar to a burnout, but requires a slightly more sophisticated technique. Once a control line is established, firefighters may set a controlled blaze downwind of the main fire, just on the inside of the control line. Firefighters then push the new blaze back toward the main fire, burning up all the fuel that lies between the fire and the control line.

4. FLANKING

For a wildfire small enough to be snuffed out using a direct attack, firefighters may begin their assault on the blaze from behind. Starting from already burned earth, the firefighters will typically work their way around the edge of the fire to spray the flames as they make their way around the entire perimeter of the blaze.

5. HOT SPOTTING

Hot spotting is the term used to describe the extra attention given to the most active and dangerous portions of a wildfire. The crews fighting the fire size up the parts of the blaze most likely to spread and try to devise the best strategy for keeping these areas in check. Hot spotting may also involve diverting extra manpower to the task of stamping out embers and spot fires that blow or erupt from the hottest part of the fire.

6. KNOCK DOWN

Whereas hot spotting refers to the assessment of a fire's condition, knocking down is all about action. The knock down strategy is employed when firefighters decide that a certain hotspot needs to be suppressed immediately. To diminish the section of a fire deemed to have grown too hot, too active, or too large, fighters directly apply some combination of dirt, water, or retardant to that section.

7. COLD TRAILING

While a fire is being attacked from the front or side, other firefighters may be involved in cold trailing, the task of combing through already scorched ground in the wake of a moving wildfire. The point is to make sure no hot or glowing embers remain, since leftover coals can be blown around and flame up again.

8. AERIAL ATTACK

If significant exposed water sources are nearby, planes and helicopters can scoop up buckets of water and carry them to be dropped atop the blaze. The water is often mixed with a foam retardant before being dropped [PDF]. The foamed water acts as a more effective barrier to the spread of fire and also insulates fuel that has not yet burned.

9. FIRELINE EXPLOSIVES

When setting control lines or firelines, firefighters may even use explosives to break up dense brush and fallen trees. Explosives can also be used to fell trees whose spread might help a fire jump across a control line. During a large or fast-moving fire, explosives are employed mainly for efficiency purposes, as they can save precious time when firefighters need to contain a fire quickly.

10. MOP-UP

It's called mop-up when firefighters go back and clean up along a completed control line. Mop-up consists of dousing any embers and spot fires that have made their way across control lines. It also involves protecting still-vulnerable fuels using a burnout (if they're permanently situated) or by simply moving them.

This story originally ran in 2014.

This Smart Accessory Converts Your Instant Pot Into an Air Fryer

Amazon
Amazon

If you can make a recipe in a slow cooker, Dutch oven, or rice cooker, you can likely adapt it for an Instant Pot. Now, this all-in-one cooker can be converted into an air fryer with one handy accessory.

This Instant Pot air fryer lid—currently available on Amazon for $80—adds six new cooking functions to your 6-quart Instant Pot. You can select the air fry setting to get food hot and crispy fast, using as little as 2 tablespoons of oil. Other options include roast, bake, broil, dehydrate, and reheat.

Many dishes you would prepare in the oven or on the stovetop can be made in your Instant Pot when you switch out the lids. Chicken wings, French fries, and onion rings are just a few of the possibilities mentioned in the product description. And if you're used to frying being a hot, arduous process, this lid works without consuming a ton of energy or heating up your kitchen.

The lid comes with a multi-level air fry basket, a broiling and dehydrating tray, and a protective pad and storage cover. Check it out on Amazon.

For more clever ways to use your Instant Pot, take a look at these recipes.

At Mental Floss, we only write about the products we love and want to share with our readers, so all products are chosen independently by our editors. Mental Floss has affiliate relationships with certain retailers and may receive a percentage of any sale made from the links on this page. Prices and availability are accurate as of the time of publication.

13 Memorable Facts About D-Day

American troops landing on Omaha beach at Normandy on D-Day.
American troops landing on Omaha beach at Normandy on D-Day.
Keystone/Getty Images

The Normandy landings—an event better known as “D-Day”—became a pivotal moment in the Second World War. Heavy losses were inflicted on both sides, but with planning, deception, and semiaquatic tanks, the Allied forces pulled off what is considered the biggest amphibious invasion in history. Here are a few things you should know about the historic crusade to liberate France from Nazi Germany.

1. D-Day occurred on June 6, 1944.

The D-Day invasion was several years in the making. In December 1941, the United States formally entered World War II. Shortly thereafter, British and American strategists began entertaining the possibility of a huge offensive across the English Channel and into Nazi-occupied France. But first, the Allies swept through northern Africa and southern Italy, weakening the Axis hold on the Mediterranean Sea. Their strategy resulted in Italy’s unconditional surrender in September 1943 (though that wasn’t the end of the war in Italy). Earlier that year, the Western allies started making preparations for a campaign that would finally open up a new front in northwestern France. It was going to be an amphibious assault, with tens of thousands of men leaving England and then landing on France’s Atlantic coastline.

2. Normandy was chosen as the D-Day landing site because the Allies were hoping to surprise German forces.

Since the Germans would presumably expect an attack on the Pas de Calais—the closest point to the UK—the Allies decided to hit the beaches of Normandy instead. Normandy was also within flying distance of war planes stationed in England, and it had a conveniently located port.

3. D-Day action centered around five beaches that were code-named "Utah," "Omaha," "Gold," "Juno," and "Sword."

American assault troops and equipment landing on Omaha beach on the Northern coast of France.
Fox Photos/Getty Images

Altogether, the D-Day landing beaches encompassed 50 miles of coastline real estate [PDF]. The Canadian 3rd Division landed on Juno; British forces touched down on Gold and Sword; and the Americans were sent to Utah and Omaha. Of the five beaches, Omaha had the most bloodshed: Roughly 2400 American casualties—plus 1200 German casualties—occurred there. How the beaches got their code-names is a mystery, although it’s been claimed that American general Omar Bradley named “Omaha” and “Utah” after two of his staff carpenters. (One of the men came from Omaha, Nebraska, while the other called Provo, Utah, home.)

4. Pulling off the D-Day landings involved some elaborate trickery to fool the Nazis.

If the Allies landed in France, Hitler was confident that his men could repel them. “They will get the thrashing of their lives,” the Führer boasted. But in order to do that, the German military would need to know exactly where the Allied troops planned to begin their invasion. So in 1943, the Allies kicked off an ingenious misinformation campaign. Using everything from phony radio transmissions to inflatable tanks, they successfully convinced the Germans that the British and American forces planned to make landfall at the Pas de Calais. Duped by the charade, the Germans kept a large percentage of their troops stationed there (and in Norway, which was the rumored target of another bogus attack). That left Normandy relatively under-defended when D-Day came along.

5. D-Day was planned with the help of meteorologists.

The landings at Normandy and subsequent invasion of France were code-named “Operation Overlord,” and General Dwight D. Eisenhower (the future U.S. president) led the operation. To choose the right date for his invasion, Eisenhower consulted with three different teams of meteorologists, who predicted that in early June, the weather would be best on June 5, 6, or 7; if not then, they'd have to wait for late June.

Originally, Eisenhower wanted to start the operation on June 5. But the weather didn’t cooperate. To quote geophysicist Walter Munk, “On [that date], there were very high winds, and Eisenhower made the decision to wait 24 hours. However, 24 hours later, the Americans predicted there would be a break in the storm and that conditions would be difficult, but not impossible.” Ultimately, Ike began the attack on June 6, even though the weather was less than ideal. It’s worth noting that if he’d waited for a clearer day, the Germans might have been better prepared for his advance. (As for the dates they'd suggested for late June? There was a massive storm.)

6. "D-Day" was a common military term, according to Eisenhower's personal aide.

A few years after Eisenhower retired from public life, he was asked if the “D” in “D-day” stood for anything. In response to this inquiry, his aide Robert Schultz (a brigadier general) said that “any amphibious operation has a ‘departed date’; therefore the shortened term ‘D-Day’ is used” [PDF].

7. D-Day was among the largest amphibious assaults in military history.

U.S. troops in landing craft, during the D-Day landings.
Keystone/Getty Images

On D-Day, approximately 156,115 Allied troops—representing the United States, the United Kingdom, Canada, Australia, Belgium, Czechoslovakia, France, Greece, New Zealand, Norway, and Poland—landed on the beaches of Normandy. They were accompanied by almost 7000 nautical vessels. In terms of aerial support, the Allies showed up with more than 10,000 individual aircrafts, which outnumbered the German planes 30 to one.

8. On D-Day, floating tanks were deployed by the Allies.

The brainchild of British engineers, the Sherman Duplex Drive Tanks (a.k.a. “Donald Duck” tanks) came with foldable canvas screens that could be unfurled at will, turning the vehicle into a crude boat. Once afloat, the tanks were driven forward with a set of propellers. They had a top nautical speed of just under 5 mph. The Duplex Drives that were sent to Juno, Sword, and Gold fared a lot better than those assigned to Omaha or Utah. The one at Omaha mostly sank because they had to travel across larger stretches of water—and they encountered choppier waves.

9. When the D-Day attack started, Adolf Hitler was asleep.

On the eve of D-Day, Hitler was entertaining Joseph Goebbels and some other guests at his home in the Alps. The dictator didn’t go to bed until 3 a.m. Just three and a half hours later, at 6:30 a.m., the opening land invasions at Normandy began. (And by that point, Allied gliders and paratroopers had been touching down nearby since 12:16 in the morning.) Hitler was finally roused at noon, when his arms minister informed him about the massive assault underway in Normandy. Hitler didn’t take it seriously and was slow to authorize a top general’s request for reinforcements. That mistake proved critical.

10. DWIGHT Eisenhower was fully prepared to accept blame if things went badly on D-Day.

General Dwight D Eisenhower watches the Allied landing operations from the deck of a warship in the English Channel on D-Day.
Keystone/Getty Images

While Hitler was partying in the Alps, Eisenhower was drafting a bleak message. The success of Operation Overlord was by no means guaranteed, and if something went horribly awry, Ike might have had no choice but to order a full retreat. So he preemptively wrote a brief statement that he intended to release if the invasion fell apart. “Our landings in the Cherbourg-Havre area have failed to gain a satisfactory foothold and I have withdrawn the troops,” it said. “My decision to attack at this time and place was based upon the best information available. The troops, the air and the Navy did all that bravery and devotion to duty could do. If any blame or fault attaches to the attempt it is mine alone.”

11. Knocking out German communications was one of the keys to victory on D-Day.

Hitler may not have had all of his troops in the right spot, but the Germans who’d been stationed at Normandy did enjoy some crucial advantages. At many localities—Omaha Beach included—the Nazi forces had high-powered machine guns and fortified positions. That combination enabled them to mow down huge numbers of Allied troops. But before the dawn broke on June 6, British and American paratroopers had landed behind enemy lines and taken out vital lines of communication while capturing some important bridges. Ultimately, that helped turn the tide against Germany.

12. Theodore Roosevelt's son earned a medal of honor for fighting on D-Day.

It was the 56-year-old brigadier general Theodore Roosevelt Jr. who led the first wave of troops on Utah Beach. The men, who had been pushed off-course by the turbulent waters, missed their original destination by over 2000 yards. Undaunted, Roosevelt announced, “We’re going to start the war from right here.” Though he was arthritic and walked with a cane, Roosevelt insisted on putting himself right in the heart of the action. Under his leadership, the beach was taken in short order. Roosevelt, who died of natural causes one month later, was posthumously awarded the Medal of Honor.

13. D-Day was the opening chapter in a long campaign.

The Normandy invasion was not a one-day affair; it raged on until Allied forces crossed the River Seine in August [PDF]. Altogether, the Allies took about 200,000 casualties over the course of the campaign—including 4413 deaths on D-Day alone. According to the D-Day Center, “No reliable figures exist for the German losses, but it is estimated that around 200,000 were killed or wounded with approximately 200,000 more taken prisoner.” On May 7, 1945—less than a year after D-Day—Germany surrendered, ending the war in its European Theater.