| X30 | Exposure to excessive natural heat |
| X31 | Exposure to excessive natural cold |
| X32 | Exposure to sunlight |
| X34 | Earthquake |
| X35 | Volcanic eruption |
| X36 | Avalanche, landslide and other earth movements |
| X36.0 | Collapse of dam or man-made structure causing earth movement |
| X36.1 | Avalanche, landslide, or mudslide |
| X37 | Cataclysmic storm |
| X37.0 | Hurricane |
| X37.1 | Tornado |
| X37.2 | Blizzard (snow)(ice) |
| X37.3 | Dust storm |
| X37.4 | Tidalwave |
| X37.41 | Tidal wave due to earthquake or volcanic eruption |
| X37.42 | Tidal wave due to storm |
| X37.43 | Tidal wave due to landslide |
| X37.8 | Other cataclysmic storms |
| X37.9 | Unspecified cataclysmic storm |
| X38 | Flood |
| X39 | Exposure to other forces of nature |
| X39.0 | Exposure to natural radiation |
| X39.01 | Exposure to radon |
| X39.08 | Exposure to other natural radiation |
| X39.8 | Other exposure to forces of nature |