California Governor Newsom signed Bill AB2238, one of the most substantive bills addressing climate-driven heat on September 9, 2022. This bill would require the agency, by January 1, 2025, to develop a statewide extreme heat ranking system in coordination with the ICARP, the State Department of Public Health, and the Department of Insurance, as provided. The signing by the Governor marks the significance of California being the first state to do so.
“CA Governor signed my measure, #AB2238, creating the nation’s first Advance Warning & Ranking System for Extreme Heat Waves! Believe it or not, this may be the coolest summer of our lives. CA will continue to experience record breaking heat waves.” Said Assemblywoman Luz Rivas, the lead author of this bill.
州長紐森（Gavin Newsom）遠早於九月三十日期限之前的九月九日，就簽署了AB 2238法案，因此，加州成為美國第一個對熱浪制定分級系統的州。
每當颶風、野火、龍捲風等自然災害來襲時，美國都會予以分級和取名，以顯示其破壞力的嚴重程度。美國目前並沒有熱浪的分級系統，但加州現在提出一項法案，要求開始對極端熱浪進行分級。
由於缺乏明確的溝通工具來警告公眾關於危險的高溫，加州議會提出AB2238法案，要求加州環境保護局（Environmental Protection Agency）在2025年1月1日之前制定一個熱浪分級系統。