As part of the ERDF Bremen 2021-2027 program under the guideline “Promotion of application-oriented environmental technologies” (PFAU) of the Senator for Environment, Climate and Science of the Free Hanseatic City of Bremen, our new project “TC-Monitor” – How drying out of soils could burden the power grid due to increasing thermal resistance – is being funded. The project aims to investigate how the thermal conductivity (TC) changes due to different water contents. This parameter is important for power cables, but has rarely been measured in-situ when planning land routes. On land in particular, it can be assumed that the sediments in which the cables are laid will increasingly dry out due to longer periods of drought, which increases their thermal resistance and the cables are no longer cooled effectively. In the worst case, there is a risk of damage to the cable. The project aims to help make the growing electricity grids more resilient to climate change.