Dear Authors:

Thank you for providing your responses to referee comments.
Your manuscript has three referees who are experts of the research area. Notably, all of them judged the scientific significance of your manuscript as ‘excellent’ and two of them did also for the scientific quality and presentation quality (one chose ‘good’ for these items). Considering the referee reports, your manuscript would only require minor revision before acceptance for publication.
I studied your reply to individual referee comments and found that you responded appropriately, making the manuscript clearer. I have a small concern about your reply to Remark 1 of Referee #3; nighttime temperature can be also important in terms of heat stress by stimulating carbon loss by respiration. However, I agree that daytime temperature may well represent the heat stress influences.
Impact assessment of extreme event is a hot topic of the research area of global change, and so I recommend revising the manuscript as carefully as possible (e.g., definition of “extreme”). Considering referee comments (if any, additional ones), I will make the final judgement on the revised manuscript.

Dear Authors:
Thank you for uploading your revised manuscript.
After examining marked (annotated) parts, I found that your manuscript was improved sufficiently; especially, it became clearer for seasonal phases. I have received no additional comments from referees on your responses. So, I conclude that this manuscript would be accepted for publication.