A private platform recorded an instantaneous AQI peak of 512, while the previous day's official average was 261. The measures differ, but fine particles remain hazardous and forecasts point to several adverse days.
A counterfactual analysis estimates that climate change nearly tripled the area burned during four critical July days and added smoke linked to almost 500 premature deaths. The work has not yet been peer reviewed.
The 3 p.m. report on 23 August classified air quality in the Valley of Mexico as poor and the health risk as high. Iztapalapa and Nezahualcóyotl posted the worst readings, while five stations provided no data.