On June 15, 2023, FERC adopted two rules designed to help improve the reliability and resilience of the bulk power system against extreme weather. The first rule directs the North American Electric Reliability Corporation (NERC) to develop a new or modified reliability standard to require transmission system planning for extreme heat and cold weather conditions over wide geographical areas, including studying the impact of concurrent failures of bulk power system generation and transmission equipment and implementing corrective actions as needed (E-1: RM22-10). The second rule directs transmission providers to submit one-time reports describing their policies and processes for conducting extreme weather vulnerability assessments and developing mitigation strategies (E-2: RM22-16, AD21-13).