Air quality turned moderate Friday as particles were trapped near the ground, while weekend heat raised ozone risk. The temporary preventive alert called for extra care by children and people with respiratory conditions.
Wildfire smoke and pollution indexes show again that public health, urban planning and climate action have become central variables in organizing major sporting events.
A scientific commentary argues that environmental change, declining rodent diversity, reservoir microbiomes and global travel should be integrated into early warning systems under a One Health approach.