Dense fog blanketed the Área Metropolitana de Buenos Aires, reducing visibility and disrupting both air and ground transportation this week [1, 2].
The weather event created significant logistical challenges for the city's infrastructure. When visibility drops sharply in a major metropolitan hub, it triggers safety protocols that can delay thousands of commuters and jeopardize flight schedules.
Reports on the exact timing of the phenomenon vary. Some sources said the fog covered the AMBA in the early hours of Monday [2], while others said the heavy presence of fog began Tuesday in the early morning [1].
Air travel was particularly affected by the conditions. At least 13 flights were diverted due to the fog [1]. Ground transportation also faced disruptions as drivers navigated the metropolitan area under limited visibility.
Meteorologists said that the fog formed after recent rains and high humidity [2]. This followed the passage of a polar wave that brought cold temperatures to the region. During that preceding polar wave, the lowest perceived temperature reached -2 °C [3].
The combination of moisture from the rains and the sudden drop in temperature created the ideal environment for the dense layer of fog to settle over the city. Local authorities monitored the situation as the city managed the resulting traffic and aviation delays [1, 2].
“At least 13 flights were diverted due to the fog”
The intersection of a polar wave and high humidity levels illustrates how rapid temperature fluctuations can create hazardous meteorological conditions in urban environments. The diversion of over a dozen flights underscores the vulnerability of the AMBA's transport network to sudden visibility drops, highlighting the ongoing challenge of maintaining transit efficiency during volatile weather transitions.
