Photos show how smoke from Canada wildfires changed the view of America's monuments

Wildfires in Canada have caused hazy and hazardous air quality conditions across much of the United States.

Wind currents carrying smoke from Canada's wildfires — some which were ignited by lightning strikes coupled with unusually hot, dry weather — have temporarily upended life for many in the Northeast and Midwest. The low-pressure system adrift over Maine and Nova Scotia is likely the cause of poor air quality, which could linger through next week, according to experts.

Many events, including Major League Baseball games, and outdoor activities have been postponed or canceled due to the poor air quality conditions.

Before and after photos from across the nation highlight dramatic shifts in scenery.

Baseball fans enjoyed a near-perfect afternoon as the St. Louis Cardinals defeated the Philadelphia Phillies 7-4 during MLB action at the Citizens Bank Park on May 6, 2004, in Philadelphia, Pennsylvania.
Baseball fans enjoyed a near-perfect afternoon as the St. Louis Cardinals defeated the Philadelphia Phillies 7-4 during MLB action at the Citizens Bank Park on May 6, 2004, in Philadelphia, Pennsylvania.
Stadium views after smoke from Canadian wildfires cause a postponement of the game between the Philadelphia Phillies and the Detroit Tigers at Citizens Bank Park.
Stadium views after smoke from Canadian wildfires cause a postponement of the game between the Philadelphia Phillies and the Detroit Tigers at Citizens Bank Park.
Boston harbor and the city skyline are seen, Friday, Oct. 28, 2022, in Boston.
Boston harbor and the city skyline are seen, Friday, Oct. 28, 2022, in Boston.
The Boston skyline is pictured shrouded in smoke as the sun sets, in Boston, Massachusetts on June 6, 2023. Smoke from the hundreds of wildfires blazing in eastern Canada has drifted south. Hundreds of wildfires were burning in Canada on June 6, 2023, according to the Canadian Interagency Forest Fire Centre, as fires have broken out across the country in recent weeks. Quebec alone had more than 150 active blazes across the province, the fire agency said.
A man walks past the Lincoln Memorial Reflecting Pool and Washington Monument as sunrise approaches on Thanksgiving, Thursday, Nov. 26, 2020, in Washington.
A man walks past the Lincoln Memorial Reflecting Pool and Washington Monument as sunrise approaches on Thanksgiving, Thursday, Nov. 26, 2020, in Washington.
With the Washington Monument in the background and a thick layer of smoke, the Marine Corps honor color guard rehearse, Thursday, June 8, 2023, in Washington. Intense Canadian wildfires are blanketing the northeastern U.S. in a dystopian haze, turning the air acrid, the sky yellowish gray, and prompting warnings for vulnerable populations to stay inside.
The Philadelphia side of the Benjamin Franklin Bridge spanning the Delaware River is seen, Wednesday, Feb. 10, 2021.
The Philadelphia side of the Benjamin Franklin Bridge spanning the Delaware River is seen, Wednesday, Feb. 10, 2021.
A hazy Benjamin Franklin Bridge, caused by smoke from Canada's wildfires, is seen from Penn Treaty Park in Philadelphia on June 7, 2023. An orange-tinged smog caused by Canada's wildfires shrouded New York on June 7, 2023, obscuring skyscrapers and causing residents to don face masks, as cities along the US East Coast issued air quality alerts.
A hazy Benjamin Franklin Bridge, caused by smoke from Canada's wildfires, is seen from Penn Treaty Park in Philadelphia on June 7, 2023. An orange-tinged smog caused by Canada's wildfires shrouded New York on June 7, 2023, obscuring skyscrapers and causing residents to don face masks, as cities along the US East Coast issued air quality alerts.
The Empire State Building glows blue during dusk, Monday, Nov. 14, 2022, in New York.
The Empire State Building glows blue during dusk, Monday, Nov. 14, 2022, in New York.
Smoky haze from wildfires in Canada diminishes the visibility of the Empire State Building on June 7, 2023, in New York City. New York topped the list of most polluted major cities in the world on Tuesday night, as smoke from the fires continues to blanket the East Coast.
Smoky haze from wildfires in Canada diminishes the visibility of the Empire State Building on June 7, 2023, in New York City. New York topped the list of most polluted major cities in the world on Tuesday night, as smoke from the fires continues to blanket the East Coast.
One World Trade Center, center, towers above the lower Manhattan skyline, the East River, and the Brooklyn Bridge, right, Aug. 14, 2013, in New York.
One World Trade Center, center, towers above the lower Manhattan skyline, the East River, and the Brooklyn Bridge, right, Aug. 14, 2013, in New York.
The Lower Manhattan skyline and Brooklyn Bridge are obscured by hazy skies on June 7, 2023, in New York City. Smoke and haze from large forest fires in Canada have covered the New York City region, blocking out sunlight and pushing the air quality index to hazardous levels.
The Lower Manhattan skyline and Brooklyn Bridge are obscured by hazy skies on June 7, 2023, in New York City. Smoke and haze from large forest fires in Canada have covered the New York City region, blocking out sunlight and pushing the air quality index to hazardous levels.

Contributing: George Petras, Janet Loehrke, Stephen J. Beard, Javier Zarracina

This article originally appeared on USA TODAY: Canadian wildfires coat US skies with hazy and poor quality air