In the area you have selected (San Diego) volcanic hazard is classified as medium according to the information that is currently available. This means that the selected area is located at less than 50 km from a volcano for which a potentially damaging eruption has been recorded in the past 10,000 years and that future damaging eruptions are possible. Based on this information, the impact of volcanic eruption should be considered in all phases of the project, in particular during project design, implementation and maintenance. Further detailed information should be obtained to adequately account for the level of hazard.
Climate change impact: Future ice mass loss on volcanoes currently under glaciers could lead to eruptions (IPCC 2013).
For further information the following resources could be consulted: