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EARTH-2026-0042
Resolved, and now being watched so it does not simply happen again.
On the morning of 1 September 2026 smoke from wildfires in Kalimantan, Indonesia, carried by the southwest monsoon, drove PM2.5 readings at 11 DENR-EMB stations in Metro Manila into the Acutely Unhealthy range, led by Parañaque at 296, Quezon City at 241, Las Piñas at 237 and Manila at 231. Navotas and Pateros registered Very Unhealthy and Makati was Unhealthy for Sensitive Groups. The EMB advised residents to limit prolonged outdoor activity and wear masks, and said conditions should gradually improve around 4-6 September if rain persists.
This case is documented in public reporting. Every fact on this page comes from the sources below, which are kept against the case so the record can be checked.
Every change of state, timestamped, oldest first. Entries are added, never edited or removed, so the record of how long something took cannot be quietly improved later.
Eleven Metro Manila stations recorded Acutely Unhealthy PM2.5 levels attributed to haze from Kalimantan fires.
Recorded by DENR-EMB
Advisory issued to limit outdoor activity and wear masks, with improvement expected 4-6 September if rain continues.
Recorded by DENR-EMB
The measured result
Taken on a return visit after the work was done, not estimated on the day.