Wildfire smoke increasingly interferes with travel across multiple regions worldwide, driven by longer fire seasons and larger burns that inject fine particles into air columns that travel long distances.
Regions at risk
In North America, Western United States states such as California, Oregon, and Washington and Western Canada provinces including British Columbia and Alberta face frequent smoke events that close highways and disrupt flights. Research by Daniel Swain University of California Los Angeles documents the growing frequency of extreme fire seasons in the U.S. West. Northern latitudes across Siberia and the Russian Far East have produced massive smoke plumes in recent years, affecting aviation and air quality across Eurasia; NASA analyses track these transcontinental transport events. The Mediterranean basin and southern Europe, where Greece, Spain, and Turkey experience increasingly severe summer fires, also see episodic smoke that shrouds tourist regions and forces cancellations. Tropical and subtropical zones are affected differently: peat and forest fires in Indonesia routinely generate haze that disrupts air travel within Southeast Asia, while the Amazon and parts of central Africa can produce seasonal smoke that complicates regional transport. Australia’s southeast and Tasmania, historically fire-prone, now face more intense smoke events during the summer tourist season.
Causes and consequences
Multiple studies point to human-driven climate change and land-use patterns as central drivers. John T. Abatzoglou University of Idaho has documented how warming and earlier snowmelt lengthen fire seasons, while Jennifer Balch University of Colorado Boulder links human ignition sources and vegetation changes to increased burned area. The immediate consequence for travel is visibility reduction and hazardous air quality that forces airport closures, flight rerouting, ferry delays, and road closures. Beyond logistics, smoke increases fine particulate matter that harms respiratory health, strains healthcare systems in destination regions, and deters tourism revenue. Cultural and territorial nuances matter: Indigenous communities' fire stewardship practices can reduce risk in some landscapes, while cross-border smoke raises diplomatic and regulatory challenges, as seen when Indonesian peat fires affect neighboring countries.
Responding effectively requires integrating meteorological smoke forecasts, land management reform, and public-health advisories. Institutions such as NOAA and NASA provide observational and modeling capacity to anticipate transport, but local planning and international cooperation determine whether travel disruptions are minimized or compounded during increasingly severe fire seasons.