Contingency plans are predefined actions that the project team will take if an identified risk event occurs. They are designed to reduce the impact or probability of the risk, or to restore the project to its original objectives. Contingency plans are part of the risk response planning process, and they should be documented in the risk register. In this case, the risk manager should execute the contingency plans to deal with the delays caused by the weather, as they cannot be avoided or mitigated. Performing time recovery actions, executing prevention plans, or performing change management are not appropriate responses for this risk, as they are either reactive, proactive, or corrective measures that do not address the risk directly. References: = PMBOK Guide, 6th edition, page 443; The Standard for Risk Management in Portfolios, Programs, and Projects, page 75.