Fire is a phenomenon of combustion manifested in intense heat and light in the form of a glow or flames. The word fire when used with an indefinite article is commonly used to describe either a fuel in a state of combustion (such as a campfire or a fire in a fireplace or kitchen stove) or an instance of violent, destructive and uncontrolled burning (such as a wildfire and fires in buildings and vehicles.

Creation of fire

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Fire is not a state of matter: rather, it is an exothermic chemical reaction accompanied by intense heat released during a rapid oxidation of combustible material. Fire may be visible as the brilliant glow and flames and may produce smoke.

Fires start when a flammable or combustible material with adequate supply of oxygen or other oxidizer is subjected to enough heat. The common fire-causing sources of heat include a spark, another fire (such as an explosion, a fire in the oven or fireplace, or a lit match, lighter or cigarette) and sources of intense thermal radiation (such as sunlight, a flue, an incandescent light bulb or a radiant heater). Mechanical and electrical machinery may cause fire when combustible materials used on or located near the equipment are exposed to intense heat from Joule heating, friction or exhaust gas. Fires can sustain themselves by the further release of heat energy in the process of combustion and may propagate, provided there is continuous supply of oxygen and fuel. Fires may become uncontrolled and cause great damage to and destruction of human life, animals, plants and property.

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NPR Topics: Politics & Society

Alaska Gov. Palin To Resign
Fri, 03 Jul 2009 19:44:00 -0400
Alaska Gov. Sarah Palin, who was Republican Sen. John McCain's running mate in the 2008 presidential campaign, says she will resign from office July 26.
Gov. Ted Strickland On Ohio's Budget Impasse
Fri, 03 Jul 2009 16:45:00 -0400
Ohio is facing a $3.2 billion shortfall in its finances. Gov. Ted Strickland has proposed slots at racetracks and spending cuts, but has not been able to reach a deal with the Legislature. The state is operating on a temporary budget for the next few days.
Rare Copy Of Declaration Found In England
Fri, 03 Jul 2009 16:00:00 -0400
An original copy of the Declaration of Independence was recently discovered in the British National Archives. Edward Hampshire, the diplomatic and colonial specialist at the archives, talks with Melissa Block about the discovery of the 26th copy of the document.

The Talk of the Town

Lauren Collins: Track School
Lauren Collins Mon, 29 Jun 2009 04:00:00 -0000
June marks the onset of what one Village resident refers to as “devil-baby season”--the time of the year when the temperature climbs and New Yorkers start doing crazy stuff. This year, the weather stayed cold, and damp. Things still got weird. On Long Island, a newborn was found . . .
James Surowiecki: Caveat Mortgagor
James Surowiecki Mon, 29 Jun 2009 04:00:00 -0000
In 1937, the Massengill Company began selling a health product called Elixir Sulfanilamide, which contained one of the antibiotic sulfa drugs. Unfortunately, it also contained diethylene glycol, a solvent that happens to be deadly to humans. In a matter of months, the elixir killed more than a hundred consumers. The . . .
Hendrik Hertzberg: Stonewall Plus Forty
Hendrik Hertzberg Mon, 29 Jun 2009 04:00:00 -0000
The most improbable of America’s mass movements for civil rights--improbable at the time, inevitable in retrospect--got its start at a most improbable hour in a most improbable place. The hour: two in the morning, forty years ago. The place: the sidewalk in front of the Stonewall Inn, a . . .

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