HYDESim maps overpressure radii generated by a ground-level detonation; these radii are an indicator of structural damage to buildings. No other effects, such as thermal damage or fallout levels, are included in this tool. Note that the displayed rings are "idealized"; that is, no account is taken of terrain, urban density, ground type, weather conditions, and so on.
The data used in HYDESim are based on information found in "The Effects of Nuclear Weapons", 3rd Edition, by Samuel Glasstone and Philip J. Dolan.
| 15 psi | Complete destruction of reinforced concrete structures, such as skyscrapers, will occur within this ring. Between 7 psi and 15 psi, there will be severe to total damage to these types of structures. |
|---|---|
| 5 psi | Complete destruction of ordinary houses, and moderate to severe damage to reinforced concrete structures, will occur within this ring. |
| 2 psi | Severe damage to ordinary houses, and light to moderate damage to reinforced concrete structures, will occur within this ring. |
| 1 psi | Light damage to all structures, and light to moderate damage to ordinary houses, will occur within this ring. |
| 0.25 psi | Most glass surfaces, such as windows, will shatter within this ring, some with enough force to cause injury. |