Land surface transformations associated to the urbanization has impacted local climates and terrestrial surface energy processes. The occurrence of higher temperatures in urbanized areas when compared to rural and natural areas is called surface urban heat island (SUHI). The aim of this work was to investigate different remote sensing thermal indices and their impact in an urbanized and industrialized city in Southeast Brazil. This municipality constitutes an interesting case of middle-sized city, between two big cities, that might be currently undergoing unsustainable growth. Landsat satellite images were used to derive the thermal indices based on Land Surface Temperature (LST). The results showed that high LST values were concentrated in urban and industrial areas, with buildings, impermeable pavements and sparse vegetation. Urbanized and poorly vegetated areas showed high SUHI intensity. Vegetated areas had the best thermal comfort in town. Industries and parking lots were frequently classified as SUHI and were also considered as urban hot spots. The type of materials used in constructing these areas seems to be a reason for the higher temperatures. Further studies are needed in order to better understand the thermal conductivity of those materials and to plan how to reduce temperature in such areas.

与城市化相关的地表变化已经影响了当地的气候和地面地表能量过程。与农村和自然地区相比，城市化地区出现的更高温度被称为地表城市热岛（SUHI）。这项工作的目的是调查不同的遥感热指数及其对巴西东南部城市化和工业化城市的影响。这个自治市构成了一个有趣的中型城市，位于两个大城市之间，目前可能正在不可持续地增长。使用Landsat卫星图像基于陆地表面温度（LST）得出热指数。结果表明，高LST值集中在城市和工业区，建筑物，不透水的人行道和稀疏的植被。城市化和植被差的地区显示出较高的SUHI强度。有植被的地区在城镇中具有最佳的热舒适性。工业和停车场经常被归类为SUHI，也被视为城市热点。用于构造这些区域的材料类型似乎是温度升高的原因。为了更好地理解这些材料的热导率并计划如何降低此类区域的温度，需要进行进一步的研究。