## 5 Conclusions  
This research enabled a comparison between two selected days in seven cities with similar meteorological conditions. The key factor was that the day corresponding to July 2020 exhibited a mobility decrease of over 40% compared to its July 2019 counterpart; this was because of the quarantine and social distancing measures implemented due to COVID-19. Figure 19 shows that three cities experienced a decrease in their average temperature of approximately 5 \({}^{\circ}\)C, while four cities exhibited an upward trend, with two presenting a difference between 4 and 6 \({}^{\circ}\)C and the other two between 0.1 and 0.6 \({}^{\circ}\)C.  
The variables of land area and population size (Figures 12 and 13), in addition to showing similar correlation values ranging in 0.28, indicate that mobility affects thermal behavior. Furthermore, the RHST and RLST are inversely proportional, meaning that, while the RLST tends to increase, the RHST tends to decrease. Considering all values, we can deduce that, for highly impermeable soils, the RLST had the best correlation, whereby a larger area of this soil type leads to low temperatures occupying more area in the city when mobility decreases. However, the RHST is not directly proportional (R\({}^{2}\) = 0.15). In the cases of moderately and poorly impermeable soils, the RHST tended to increase when mobility decreased, while the RLST occupied a smaller area in the city. The vegetation index was a key determinant of temperatures within a city [55; 56; 57]. The higher the vegetation index, the more the RHST decreases, and the RLST equalizes in the same proportion. This pattern was also observed, albeit to a lesser extent, in areas with a low NDVI, where the RLST had the lowest value. The study found that cities with elongated shapes, such as Manzanillo and Ciudad del Carmen, showed a similar pattern between the two examined days, which is also reflected in their relatively consistent NDVI values. In contrast, more centralized cities experienced significant changes in their surface temperatures between the two days, with specific thermal profiles increasing or decreasing almost equally (Figure 19). Lazaro Cardenas, Veracruz, and Coatzacoolcos experienced a marked reduction of approximately 5 \({}^{\circ}\)C in their average temperatures on the 2020 day, accompanied by a smaller increase in the NDVI. Figure 19: Values of the weighted temperature in all cases. Conversely, Puerto Vallarta and Tampico exhibited opposite trends, with temperature increases of 4.49 \({}^{\circ}\)C and 6.14 \({}^{\circ}\)C, respectively, and a corresponding decrease in the NDVI. However, changes in vegetation did not show a direct proportionality with temperature fluctuations, either in terms of increases or decreases. The analysis of thermal images (Figures 4-11) revealed that the regions with the highest surface temperatures, except for Ciudad del Carmen, were primarily designated for industrial, port, or transportation functions rather than residential use. Despite a reduction in industrial activity during 2020, it remained a significant factor. The analysis of the thermal maps of the Pacific Ocean cities allowed for the identification of the following patterns. In Puerto Vallarta, the Gustavo Diaz Ordaz International Airport consistently presented the highest isotherm, in contrast with the nearby natural protected area of \"El Salado.\" Manzanillo exhibited stable high isotherms at Federal Electricity Commission (CFE) complex and the National Commission of Mexican Petroleum (PEMEX) pelletizing plant, with a certain isothermal territorial extension at the CFE thermoelectric plant. Lazaro Cardenas experienced declines in temperature; however, the port and PEMEX complexes maintained the highest points in both years. Within the Gulf of Mexico, the Madero refinery in Tampico and the adjacent port complex exhibited a more pronounced LST, with a decreasing isothermal extension near the refinery but a greater extension within residential areas.