In the context of climate crisis, ensuring the resilience of South Korea's critical infrastructure is crucial for societal safety. This involves addressing vulnerabilities and aging management systems across various sectors, including general infrastructure, sustainable energy, information technology, national power and transportation, digital finance, public health, water management, cultural heritage safety, and international cooperation networks. Effective crisis management strategies are needed to redesign and build resilient infrastructure, fostering a sustainable and secure society. Emergency preparedness, encompassing natural and non-natural events, is essential for mitigating disaster impacts on people, environment, and business continuity. Additionally, ongoing research focuses on enhancing crisis management paradigm and adapting national infrastructure systems to climate challenges, particularly in radiological emergency preparedness of nuclear power plants in South Korea.