Heavy fog in Buenos Aires has caused widespread disruptions at the city's airports, including Aeroparque and Ezeiza International Airport. Since the early hours of July 8, 2025, the dense fog has led to delays and cancellations affecting at least 25 flights, with Aeroparque temporarily closed until weather conditions improve. The poor visibility also forced a Lufthansa Boeing 747 flight from Frankfurt, destined for Buenos Aires, to declare a 'mayday' emergency and make an emergency landing at Guarulhos Airport in São Paulo, Brazil. The fog continued to impact flight operations on July 9, causing ongoing delays and cancellations at both major Buenos Aires airports.