Please find in the attachment the general and specific comments for this manuscript.

General comments:

This document addresses the earthquake and tsunami scenario-based risk assessment based on the variable-resolution building exposure modelling and the application in Lima, Peru.

From the reviewer’s point of view, both the Central Voronoi Tessellations (CVT) itself and the application are topics of great interest since this is a useful method related to earthquake and tsunami risk assessment for communities affected or potentially affected by these threat.

However, Some process details were not explained clearly. This article uses the scientific research results of several scholars to get the research results. How to verify the research results? What is the innovative idea or technology of this article?

The general comment for the whole paper is that the reviewer has not been able to find enough significant points regarding the principal criteria of the reviewing process. 

Considering the above mentioned and after reflection, the final consideration for the review is: major revisions.

Below, there are also some specific comments intended to contribute to the improvement of the article.

Specific comments:

Section 1 (page 4): The authors could highlight the advantages of the CVT, (1) (2) (3)…

Section 3.2: A numerical calculations table is needed to show the spatial resolution, time step, spatial range, and what water depth and elevation data is used.

Section 3.2: What governing equations are used in TsunAWI. Some detail about TsunAWI should be introduced.

Section 3.6: What are the advantages of Suppasri's method and De Risi's method? Which method is the last choice? This issue should be discussed.

This manuscript is about valuating risks for natural hazards, presenting a methodological proposal based on CVT. Case studies in peril suggest that the CVT-based variable-resolution exposure models proposed have a high efficiency in integrating large-area building portfolios to adequately estimate earthquake and tsunami losses. The topic of the paper fits the Journal well. Overall, I suggest the manuscript can be accepted after minor revisions in the following aspect:

This study is interesting, but in the revised version, the authors are suggested to provided more explanation about the novel points of this manscript. Indeed I may miss something, but a clearer clarification may be better.

General comments:

The manuscript Variable-resolution building exposure modelling for earthquake and tsunami scenario-based risk assessment. An application case in Lima, Peru by Juan Camilo Gomez-Zapata et al. propose the use of variable resolution boundaries based on Central Voronoi Tessellations (CVT) to spatially aggregate building exposure models for risk assessment to various natural hazards.  The study is useful as the method  have a high efficiency in estimating the earthquake and tsunami loss.

However, there are some details in the technical part should be explained clearly by the author, like the process of  select earhquake scenario，as described in the line 290, " A Mw 9.0 tsunami scenario was selected among a catalogue...",  but I can not find the description of the cattalogue, (I'm sorry if I miss something), besides, what is the scaling law used in the determination of the parameters of tsunami source?  and some detail about TsunAWI should also be introduced. The methodology part could be more clear if a flowchart  is used I think. Considering above, I suggest the manuscript should be  reconsidered after major revisions.