Dear David F. Muñoz and co-authors,

Thank you for the submission of your manuscript “Quantifying cascading uncertainty in compound flood modeling with linked process-based and machine learning models” on HESS.

As you know, two reviewers have now provided their reviews, which you have extensively replied to. Both the reviewers recommended major revisions, and therefore I would like to invite you to submit a revised version of your manuscript.

Would you please also provide an ‘author’s reply’ to the reviewers (feel free to use the same words that you used in what you have already uploaded) and include, in the same author reply document, a track changes document between the old manuscript and the new one.

I look forward to seeing the next version of your manuscript. I will send it out again to the previous reviewers, if still available.

Best Regards
Silvia De Angeli
HESS Guest Editor
[Professor of Hydrology and Water-Related Risk, University of Genoa, Italy]

Dear David F. Muñoz and co-authors,

Thank you for re-submitting your manuscript “Quantifying cascading uncertainty in compound flood modeling with linked process-based and machine learning models”.

One reviewer has provided reviews and comments on the new version of the manuscript. The reviewer praised the outstanding quality achieved in your work, both in terms of its scientific rigor and its presentation. Therefore, the manuscript can now be accepted for publication in Hydrology and Earth System Sciences (HESS) journal, before addressing the following two minor technical suggestions:

• The summary of the hydrodynamic and regression models developed for the study area was not in the revised version before section 2.1, as the authors say in the response document.

• Add to the manuscript text the authors' explanation/justification of the rainfall input source (Harris County Rain Gauge +ERA 5) and not just on the response to reviewers since the readers will ask this same question.

Therefore, I would like to invite you to submit a revised version of your manuscript, addressing these indications, as suggested in the reviewer’s report. I look forward to seeing the next version of your manuscript which I will not send out for further review.

Regards
Silvia De Angeli
HESS Guest Editor
[Professor of Hydrology and Water-Related Risk, University of Genoa, Italy]

I agree with the editor's decision.