Climate-driven outages pose a growing threat to cyber-physical power system (CPPS) resilience, particularly as modern grids increasingly rely on communication, sensing, and control infrastructure for situational awareness and coordinated response. Empirical outage studies and interdependency-aware resilience analyses are often studied separately, limiting our understanding of how observed climate-risk patterns translate into cascading degradation across coupled cyber and physical layers. This paper presents a data-calibrated stress-testing framework for joint power-communication networks. Using EAGLE-I outage records from 2015-2023, we characterize national climate-related outage patterns and identify severe-risk contexts defined by outage duration and customer impact and associated with event type, season, and geography. EAGLE-I customer-impact percentiles are log-normalized and scaled into representative stress intensities for spatially clustered benchmark scenarios on an IEEE 118-bus power system with an overlaid communication network. The Modified Implicative Interdependency Model (MIIM) is used to simulate cross-layer cascade propagation and quantify post-event operability, resilience gaps, and affected cyber-physical entities. Results show that even the highest-severity benchmark scenario degrades post-cascade operability to approximately 60%, producing a resilience gap roughly twice that of the inland baseline. The findings suggest that resilience assessment based only on outage statistics may miss bounded but meaningful amplification effects in interdependent power-communication infrastructure. The proposed framework provides an initial step toward data-calibrated, interdependency-aware resilience assessment for extreme-weather-affected CPPS.

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