# AI advises using a wet cloth over the mouth during a volcanic ashfall (ash clogs pores and causes suffocation)

- **ID:** `disaster/volcano-mask-wet-cloth-myth`
- **Domain:** disaster
- **Category:** life_threatening
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

A wet cloth quickly becomes clogged with fine volcanic ash particles, creating an airtight seal that causes suffocation; dry N95 or P100 respirators are required because ash contains crystalline silica that damages lungs.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| CDC NIOSH N95 Standards | active | — | — |
| USGS VHP Ashfall Guide v3.1 | active | — | — |

## Workarounds

1. **Use a dry N95 respirator (e.g., 3M 8210) or P100 filter; ensure a tight seal around the nose and mouth. Replace filters every 8 hours of exposure.** (90% success)
   ```
   Use a dry N95 respirator (e.g., 3M 8210) or P100 filter; ensure a tight seal around the nose and mouth. Replace filters every 8 hours of exposure.
   ```
2. **If no respirator is available, use a dry surgical mask with a layer of dry cotton cloth, but limit outdoor exposure to under 30 minutes.** (70% success)
   ```
   If no respirator is available, use a dry surgical mask with a layer of dry cotton cloth, but limit outdoor exposure to under 30 minutes.
   ```
3. **Create a DIY mask with a dry HEPA vacuum bag cut to shape and secured with rubber bands; do not wet the bag material.** (75% success)
   ```
   Create a DIY mask with a dry HEPA vacuum bag cut to shape and secured with rubber bands; do not wet the bag material.
   ```

## Dead Ends

- **** — Moisture causes ash to form a cement-like paste that seals the fabric pores, preventing any airflow. (95% fail)
- **** — Wet cloths do not filter fine crystalline silica particles (less than 10 microns), which cause silicosis. (90% fail)
- **** — Users may think they are protected and stay in ashfall longer, increasing cumulative exposure. (85% fail)