The US Department of Defense sent real-time satellite and sensor data to Canadian authorities to quickly identify new fires as the nation endures one of its most destructive early wildfire seasons.
The US has already dispatched more than 600 firefighters to Canada to help battle the flames.
President Joe Biden, who has linked wildfires to climate change, said US officials were monitoring air quality and aviation delays.
"Starting today, DOD personnel will analyze and share real-time data derived from US satellites and sensors and convey it via a cooperative agreement between the US National Interagency Fire Center and the Canadian Interagency Forest Fire Centre," US National Security Council spokesperson Adam Hodge said in a statement.
He said the Biden Administration was also deploying additional US Department of the Interior (DOI), USDA Forest Service (USFS), and state wildland firefighting personnel and equipment to Canada.
Canada is suffering through its most destructive start to wildfire season, with about 4.8 million hectares (48,000 square kilometres) already burned, an area larger than the Netherlands.
Pope Leo XIV formally began his reign on Sunday by calling for unity, vowing to preserve the Catholic Church's heritage and not rule like "an autocrat".
Israeli airstrikes killed at least 100 Palestinians across the Gaza Strip overnight, local health authorities said on Sunday, as mediators hosted a new round of ceasefire talks between Israel and Hamas.
A Mexican Navy sailing ship festooned with lights and a giant flag crashed into the landmark Brooklyn Bridge on Saturday night, shearing the top of its masts, killing two people and injuring 17 others, New York City Mayor Eric Adams said.
Israel and Hamas resumed ceasefire talks on Saturday in Qatar, both sides said, even as Israeli forces ramped up a bombing campaign that has killed hundreds of people over 72 hours, and mobilised for a massive new ground assault.
The UAE has joined Arab states to demand an immediate halt to the war in Gaza and the establishment of a fund for its reconstruction during a summit in Baghdad.