# Top 5 Things You Need to Know About the Longview Chemical Explosion
**Breaking: Major industrial incident rocks Washington state community**
- **What happened:** A massive explosion and fire erupted at a Longview chemical plant early this morning, sending a towering plume of black smoke visible for miles across the Columbia River region. Emergency crews from three counties are currently battling the blaze, with authorities confirming at least four workers were injured and transported to local hospitals.
- **The chemical involved:** The blast originated at a facility handling **ammonium nitrate**, a highly volatile compound commonly used in fertilizers. This is the same type of chemical that caused the 2013 West Fertilizer Company explosion in Texas, raising immediate concerns about the potential for secondary detonations and toxic air exposure.
- **Evacuations and shelter-in-place:** Within a 2-mile radius, mandatory evacuations are in effect for approximately 1,200 residents, while those within a 5-mile radius are under a shelter-in-place order. Officials are urging everyone to close windows, turn off HVAC systems, and avoid outdoor activity until air quality tests are completed.
- **Infrastructure shutdown:** The explosion caused extensive damage to nearby rail lines and forced the temporary closure of a major highway (WA-432). The local port authority has halted all barge traffic on the Columbia River as a precaution, creating immediate ripple effects for the regional supply chain.
- **Investigation and response:** The U.S. Chemical Safety Board has already deployed a team to the scene. Early theories suggest a possible equipment malfunction during a transfer operation. The company's safety record is now under intense scrutiny, with OSHA records showing three prior citations for chemical storage violations in the past five years.
*Stay tuned for live updates.*