Los Angeles Appoints New Chief Heat Officer Amid Extreme Heat Concerns
• The administration of Los Angeles Mayor Karen Bass has appointed Daniela Simunovic as the city's new Chief Heat Officer, effective May 31,
• This change, confirmed by the Los Angeles Times, occurred quietly over a month ago, replacing Marta Segura, the first person to hold the position. The Chief Heat Officer oversees the city's response to extreme heat, a significant climate risk in California. Simunovic, who previously served as the senior director of climate and sustainability for three years, will also lead the Climate Emergency Mobilization Office. This office is currently collaborating with community partners to develop the City’s Heat Action and Resilience Plan, expected to be completed by early
Impact & Risks
Extreme heat is one of the deadliest climate risks in California, with heat-related illnesses accounting for nearly 1 in every 100 emergency department visits in Los Angeles County on the hottest days. In 2025, the county recorded 10 heat-related deaths. The appointment of a new Chief Heat Officer is critical as the city faces increasing challenges from rising temperatures. The role is essential for coordinating efforts to mitigate heat risks, including the development of cooling centers, tree planting for shade, and other resilience measures.
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