Before revision: On 23 June 2013, a state of emergency was declared by Prime Minister Najib Razak for Muar and Ledang, Johor as severe Southeast Asian haze that pushed the air pollution index to above 750.
After revision: On 23 June 2013, a state of emergency was declared by government for Muar and Ledang, Johor as severe Southeast Asian haze that pushed the air pollution index to above 750.