Yolo County top health official declared Monday a local health emergency to assess if hazardous material spread across soil, water and crops bordering an Esparto warehouse filled with fireworks that exploded in July and killed seven people.

Coroner states Esparto warehouse explosion victims died from blast and thermal injuries; deaths ruled accidental.

The California Attorney General's Office has declined to lead a criminal probe into the July 1 fireworks facility explosion in Esparto — known as the Oakdale Fire — that killed