Many areas remained in a code red — or even worse, code purple — on Thursday.

President Biden spoke with Prime Minister Justin Trudeau as American firefighters were deployed north to fight the wildfires burning in Canada with smoke spreading across the continent. CBS News senior White House correspondent Weijia Jiang has more on that, Mr. Biden’s meeting with U.K. Prime Minister Rishi Sunak and Mr. Biden’s veto of a bill to cancel student debt relief.

CBS News senior weather and climate producer David Parkinson has the forecast for how long the Northeast will be dealing with smoke from Canadian wildfires and what areas will be affected the most Thursday.

Poor visibility is hampering flights across East Coast for second day due to smoke from more than 100 Canadian wildfires.

Poor visibility is hampering flights across East Coast for second day due to smoke from more than 100 Canadian wildfires.

Millions of Americans are under air quality alerts as Canada’s wildfires continue to burn. CBS News medical contributor and editor-at-large for Public Health at KFF, Dr. Celine Gounder, joins “CBS Mornings” to discuss the health risks wildfire smoke poses and offers advice on how to protect yourself.

Parts of the Northeast, including New York City, were engulfed in an orange haze Wednesday due to wildfires burning in Canada. Health officials have advised people to wear masks to protect themselves from the blanket of harmful smoke. Lilia Luciano reports.

New York City had the worst air quality in the world after smoke from Canadian wildfires spread across the U.S. Northeast and conditions are expected to stay poor through the weekend. Also, former Vice President Mike Pence officially announced his 2024 presidential campaign in Iowa. All that and all that matters in today’s Eye Opener.

Ukraine’s president has called for an international rescue operation amid concern for civilians in flooded Russian-occupied parts of Kherson.

Poor air quality due to wildfires can be dangerous for pets both indoors and outdoors. Experts are sharing safety and health tips.

Smoke from wildfires burning in Canada has blanketed parts of the U.S. East Coast for more than a day now, bringing with it hazardous conditions. Nanoparticles in the smoke could be damaging to the lungs and cardiovascular system. Lilia Luciano has the latest.

Air pollution costs the U.S. $800 billion a year, data shows. Wildfires — driven by climate change — are making it worse.