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# Wildfire smoke accounted for 1.9% of deaths across ten countries and territories
- URL: https://www.coios.me/wildfire-smoke-accounted-for-1-9-of-deaths-across-ten/
- Published: 2026-09-18T23:13:24.000Z
- Updated: 2026-09-18T23:13:24.000Z
- Description: A causal analysis of 47.8 million deaths in 1366 communities across ten countries and territories attributed 906 869 deaths to landscape fire PM2·5, with instrumental-variable estimates a median 56% higher than conventional association estimates.
- Author: Daniel Ryan
- Tags: Healthcare today, Environment: air, heat, cold, World, #peer-reviewed, #refines, #item, #source-2026-09

Daily mortality records from 1366 communities in ten countries and territories over 2000-19 were linked to modelled landscape fire PM2·5, using instrumental variable models alongside conventional time-series estimates. Each 1 µg/m³ rise in the 2-day mean of landscape fire PM2·5 was associated with a 0·60% (95% CI 0·19-1·00) increase in mortality, giving 906 869 attributable deaths, or 1·90% of the total. Landscape fire smoke was 19·0% of ambient PM2·5 mass but 30·6% of PM2·5-attributable deaths.

*Why it is interesting: The instrumental-variable approach raises the attributable burden by more than half over conventional estimates, bearing directly on how smoke mortality is attributed.*

Source

[The Lancet. Planetary health, 2026-09-16](https://doi.org/10.1016/j.lanplh.2026.101506?ref=coios.me)

DOI

10.1016/j.lanplh.2026.101506

Type

Peer-reviewed article

Design

Multi-country time-series with instrumental-variable estimation, 1366 communities in ten countries and territories, 47.8 million deaths, 2000-19

Verdict

Refines prior evidence

Driver

[Environment: air, heat, cold](https://www.coios.me/d-environment/)