On February 19, 2023, the Mexico City government, alongside its State of Mexico counterpart, declared an alert for extreme heat conditions expected later in the day, with temperatures potentially reaching up to 32 degrees Celsius. This alert comes despite the absence of immediate traffic restrictions under the 'Hoy No Circula' environmental program, which aims to reduce vehicle emissions during pollution peaks. The affected municipalities within Mexico City include several districts, indicating a widespread concern about rising temperatures.

The warning underscores how extreme weather can exacerbate existing pollution issues, particularly during the winter months when air quality is typically better. The heat is anticipated to increase the concentration of pollutants in the atmosphere, further complicating the environmental challenges faced by the metropolis. As authorities monitor the air quality closely, it was reported that by 8:00 AM, the air quality remained good in the surrounding areas, potentially providing temporary relief from the ongoing pollution struggles.

The implications of the heat on air quality could lead to difficulties for public health and environmental management in the region, particularly as the warmer climate may become more frequent. This situation prompts a need for ongoing assessment and possible adjustments in urban policy to mitigate the effects of climate change and extreme weather on an already heavily populated and vulnerable environment like Mexico City.