This paper describes progress of project focused on health management and occupational safety of firefighter units’ members, especially from thermal exposition point of view. After introduction is described evolution of design of the proto-types of a pocket personal measurement device. The next part deals with the selection of precise temperature, humidity and body activity sensors. Attention is also given to power con-sumption of the device. There were made many various tests of this measurement prototype device, mostly at real case scenarios, like measurements at a thermal chamber used for firefighter’s suit testing. The last part of the paper describes software support for configuration and wireless monitoring and supervision of multiple members of a rescue team by an as-signed overseer in real time. This provides additional level of safety and can greatly help to reduce the risk of health damage caused by extreme conditions.