Post-Eaton Fire exposure — the 2025 defining pattern.
Prevailing winds pushed heavy smoke and ash from Pasadena and Altadena westward across the eastern San Fernando Valley — Burbank sustained multi-week smoke and ash exposure. HVAC distributed contamination throughout homes and buildings city-wide, and attic insulation, soft goods, and porous surfaces absorbed. Eastern Burbank sustained heavier deposition than western neighborhoods, and the wildfire smoke composite chemistry is more aggressive than wildland-only.