Why is wildfire smoke more dangerous than ordinary pollution?

The greatest health concern comes from microscopic particles known as "PM2.5," which stands for particulate matter.

These particles measure 2.5 micrometers or smaller—roughly 30 times smaller than the width of a human hair.

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The National Desk (TND) brings you award-winning local storytelling from Sinclair Broadcast Group's local TV newsrooms across the United States and feeds from sources throughout the world.

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TND covers content from Sinclair's stations in:

Abilene-San Angelo, TX : KTXS

Albany, GA : WFXL

Albany, NY : WRGB

Amarillo, TX : KVII

Asheville, NC : WLOS

Austin , TX : KEYE

Bakersfield, CA : KBAK/KBFX

Baltimore : WBFF

Beaumont, TX : KFDM/KBTV

Birmingham, AL : WBMA

Boise, ID : KBOI/KYUU

Bristol, VA : WCYB

Cedar Rapids, IA : KGAN/KFXA

Champaign, IL : WCCU

Charleston, SC : WCIV

Charleston, WV : WCHS/WVAH

Chattanooga, TN : WTVC

Cincinnati, OH : WKRC/WSTR

Columbia, SC : WACH

Columbus, OH : WSYX/WTTE

Dayton, OH : WKEF/WRGT

El Paso, TX : KFOX/KDBC

Eugene, OR : KVAL/KMTR

Eureka, CA : KAEF

Flint, MI : WEYI/WBSF

Fresno, CA : KMPH

Gainesville, FL : WGFL

Green Bay, WI : WLUK

Greenville-New Bern, NC : WCTI

Harlingen, TX : KGBT

Harrisburg, PA : WHP

Jefferson City, MO : KRCG

Johnstown, PA : WJAC

Kalamazoo-Grand Rapids, MI : WWMT

Kirksville-Ottumwa, IA : KTVO

Las Vegas, NV : KSNV

Lewiston, ID : KLEW

Lincoln, NE : KHGI/KWNB

Little Rock, AR : KATV

Lynchburg, VA : WSET

Macon, GA : WGXA

Medford, OR : KTVL

Mobile, AL : WPMI

Myrtle Beach, SC : WPDE

Nashville, TN : WZTV

Oklahoma City : KOCB/KOKH

Pasco, WA : KEPR

Pensacola, FL : WEAR/WFGX

Portland, ME : WGME/WPFO

Portland, OR : KATU/KUNP

Providence, RI : WJAR

Quincy-Hannibal, IL : KHQA

Redding-Chico, CA : KRCR

Reno, NV : KRNV/KRXI

Rochester, NY : WHAM

Salt Lake City : KUTV

San Antonio, TX : KABB/WOAI

Savannah, GA : WTGS

Seattle, WA : KOMO/KUNS

Sioux City, IA : KMEG/KPTH

South Bend, IN : WSBT

Springfield, IL : WICS

Steubenville, OH : WTOV

Syracuse, NY : WSTM

Toledo, OH : WNWO

Traverse City, MI : WPBN

Tulsa, OK : KTUL

Washington DC : WJLA

West Palm Beach, FL : WPEC

Wilkes-Barre, PA : WOLF

Yakima, WA : KIMA

This video and all Sinclair Broadcast Group content archives of local news and sports coverage are available for your use. For more information contact us at contentsales@sbgtv.com