*2.2. Air Temperature Data*

The air temperature (◦C) of the monthly hottest days observed at two meteorological stations (Lang and Ha Dong as shown in Figure 1) in Hanoi in 2016 and 2017 are listed in Table 1. Therefore, the days with the hottest air temperature are selected and considered as having the most negative effects on human health that are associated with UHI effect. From Table 1, it shows that the monthly hottest days are 2 June and 4 June in 2016 and 2017, respectively.


**Table 1.** Maximum monthly air temperatures (◦C) in Hanoi in 2016 and 2017.
