Chemical Attack & Hazmat Preparedness Guide

Chemical emergencies affect far more households from industrial accidents than from deliberate attacks. The U.S. EPA reports that industrial chemical facilities release hazardous materials approximately 600 times per year in incidents affecting nearby communities. Chemical plant explosions, train derailments carrying hazardous cargo, and industrial spills create local chemical emergency zones that require rapid shelter-in-place or evacuation decisions. A chemical spill hazmat emergency kit prepares your household for both industrial incidents and deliberate chemical attack scenarios: and the preparation is largely identical for both.

Shelter-in-Place Protocol for Chemical Emergencies

FEMA and the EPA both recommend shelter-in-place as the primary response to many chemical releases. Here’s the official protocol:

1. Get inside immediately. Close all windows and doors. A building provides significant protection against most airborne chemical threats even without perfect sealing.
2. Close and lock all windows and exterior doors. Locked gaps are tighter than unlocked ones.
3. Turn off all HVAC, fans, and ventilation. Turn off the heating and cooling system; close fireplace dampers. This prevents pulling outside air in.
4. Seal gaps. Use pre-cut plastic sheeting and duct tape to seal gaps around windows, doors, and vents. Go to an interior room: ideally an above-ground room (some chemicals are heavier than air and settle in basements).
5. Monitor official broadcasts. Tune to local emergency management, NOAA radio, or local news for guidance on what the chemical is, the hazard zone, and when it’s safe to exit or evacuate.
6. Wait for official all-clear before venturing outside.

Chemical Emergency Supply List

Shelter Sealing Materials (Pre-cut and pre-labelled)

• Heavy plastic sheeting (4-6 mil polyethylene): pre-cut pieces slightly larger than each window and door in your main shelter room
• Duct tape × 6 rolls: for sealing plastic sheeting
• Scissors + permanent marker: for cutting and labelling plastic pieces in advance
• Weather stripping tape: additional sealing for door gaps
• Storage in clearly labelled waterproof bag near shelter room

Stored Air Supply

• A properly sealed room with plastic sheeting + duct tape maintains breathable air for approximately 5 hours (10 hours for nuclear/biological incidents where concentration is lower). For longer shelter durations, plan on being able to partially crack a window for brief ventilation when outdoor concentrations have dispersed: monitor via official broadcasts.

Water for Chemical Emergency

• Pre-stored sealed water: do NOT use tap water during a chemical incident until water authority confirms safety
• Sealed bottled water × minimum 1 case per person
• Do not use open water containers that may have been contaminated by airborne chemical exposure

Food

• Sealed canned goods and factory-sealed packaged food: safe from airborne contamination if sealed
• Do not prepare or eat uncovered food during active incident

Personal Protection Equipment for Chemical Scenarios

• N100 or P100 respirator (full-face): 3M 6800 with P100+OV combination cartridges; filters particulate and organic vapours
• Half-face P100 respirator: Minimum acceptable: leaves eyes unprotected; suitable for lower-risk industrial scenarios
• Safety goggles (indirect-vent): Protect eyes from chemical vapour and aerosol: essential if a full-face respirator isn’t available
• Tyvek Type 5/6 chemical protective suit: Full-body barrier against chemical particulate and liquid splash; disposable
• Butyl rubber chemical gloves: Nitrile is insufficient for strong acids, bases, and many chemical agents
• Rubber boot covers
• Duct tape: Seal suit at wrists, ankles, and collar

Decontamination Procedures

If you’ve been exposed to an unknown chemical, self-decontamination before entering your shelter or home is critical to prevent spreading contamination:

1. Remove all outer clothing immediately: removing and bagging contaminated clothes removes up to 80% of contaminant exposure. Do this outside, bag immediately.
2. Flush with large amounts of water: wash hair, skin, and eyes with abundant clean water (15+ minutes for eyes). Do not use soap first: it can drive some chemicals deeper into skin.
3. Change into clean clothes from sealed storage inside your home
4. Bag and seal contaminated clothing: double-bag; do not handle further until official guidance
5. If eyes were exposed: flush with clean water for 15+ minutes continuously

When to Evacuate Instead of Sheltering

Evacuation is appropriate when:

• Official emergency management orders evacuation of your area
• The chemical release is adjacent to your home or indoors
• Your building cannot be effectively sealed (older construction, broken windows)
• The chemical release is expected to persist for days (prolonged industrial leak)
• You have family members with respiratory conditions that make even brief exposure extremely dangerous

Evacuation route should be perpendicular to the wind direction: move crosswind, not downwind of the release. Have your bug-out bag ready and pre-plan at least three exit routes from your home.

Living Near Industrial Facilities

If you live within 5–10 miles of a chemical plant, oil refinery, rail line carrying hazardous cargo, or industrial facility:

• Know what chemicals are stored nearby: facilities must publish this under EPCRA (Emergency Planning & Community Right-to-Know Act); check EPA’s ECHO database
• Know the specific shelter-in-place and evacuation guidance for those chemicals
• Sign up for local emergency alert system (Wireless Emergency Alerts, county notification systems)
• Know your county’s LEPC (Local Emergency Planning Committee) recommendations
• Have evacuation plan ready with route perpendicular to prevailing wind direction

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