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.

11 May 2021, Tainan City (臺南市), Taiwan, population 1,881,204

Declared a Climate Emergency (氣候緊急宣言)
Declaration is here.