Technological development and oil exploration are the major causes of environmental degradation and gas flaring. Some of the effects of gas flaring in Niger-delta region includes: greenhouse effect, acid rain, increase in temperature, acidification of aquatic ecosystem and low agricultural productivity. The thermal gradient resulting from the gas flared at Umusadege marginal oil field is hereby reported. Surface temperatures, distances, latitudes and longitudes away from the flaring point were investigated for the four (4) cardinal directions with the aid of thermometer, a fibrous meter tape and a global positioning system (GPS).The results obtained were analyzed using python and surfer 8 programs to obtain the graph of temperature against distance and the contour of temperature on the latitudes and longitudes of the study area. The result did not only show surface temperature elevation of about 9.10C above the mean normal daily temperature within a radius of 210m but a temperature gradient of 0.050c/m, hence the thermal equilibrium of Umusadege-Ogbe, Kwale has been altered. This rise in temperature has negative effects on man and his environment especially on the socio-economic lives and activities of the inhabitants of the area. It is therefore important that government agencies charged with the duty of monitoring the environment should embark on adequate measures to stop the environmental degradation before enormous and or permanent damage is caused. From the study carried out in the area, it will be important and advisable that residential buildings should be situated at least 210m away from the flare stack. The information obtained will be useful to both the government and individuals. Furthermore, the companies involved in gas flaring should be concerned and aware of the dangers they may be causing the inhabitants and the general populace and hence provide adequate compensation.
