Is there one overall score for physical risk that can be assigned to a particular asset (i.e. which combines all the data across the different hazards)?

Having an average score hides potential exposure to extreme hazards. Additionally, different risk factors are more relevant to specific real asset types, making it difficult to define relative weightings of severity, let alone absolute ones. For these reasons, the decision was made not to combine scores across vastly different hazard and stress types, and rather to retain the information portrayed in the disaggregated scores.