Just before midnight on Friday, severe thunderstorms worked their way across Carroll County into Baltimore County.  The hardest hits areas were south of the Reisterstown area.  During the peak of the storm, Engine 412 and Rescue Squad 414 were first due on an apartment fire in Randallstown from quarters.  Power outages in the Pikesville area have caused water pumping station outage.  As water towers empty, the Reisterstown area will notice a significant drop in water pressure.  Residents are asked to conserve water until the water towers are refilled.  Full water service is expected to be restored by Sunday morning.