24 November 2020, New Taipei City (新北市), Taiwan, population 4,014,560

Declared a Climate Emergency (氣候緊急宣言)
Announcement is here.
Declaration text (in English) is here.

26 November 2020, Taitung County (臺東縣), Taiwan, population 224,470

Declared a Climate Emergency (氣候緊急宣言)

7 January 2021, Taichung City (臺中市), Taiwan, population 2,816,667

Declared a Climate Emergency on 17 January 2021 via signing the Greenpeace Taiwan declaration (see declaration text in the image above).
Municipal record is here.