With rapid advancement in technology, mobile devices are increasingly becominPo the norm. These devices are characterized by their need to operate even when they are disconnected from the fixed non-mobile world. Since existing software technology is tuned to applications that operate in a fully connected world, this requirement of disconnected 6peration creates a need to adapt existing software technology to a partially disconnected world. Databases and filesystems have already been adapted to operate in a partially disconnected environment. However, little work has been done in the context of data warehousing in such an environment. We believe that there is a real need for adapting existing data warehousing technology for the mobile world. In this position paper, we show how techniques for hierarchical data warehouse management can be applied to data warehouses in a mobile environment. The techniques can be extended for other mobile applications. We present a variety of alternatives for systems in which some of the sources of data as well as the data warehouse itself is mobile.