MILWAUKEE —Back-to-back power outages left thousands of Milwaukee County customers without electricity Monday, after a failed piece of equipment and a round of severe storms knocked out service across the region. The first began when equipment failed at a Milwaukee substation, cutting power to about 18,000 customers before storms even arrived. Storms then brought down trees, wires and power poles, knocking out power to as many as 90,000 customers. Watch: Back-to-back power outages hit Milwaukee County, leaving thousands without electricityBack-to-back power outages hit Milwaukee County, leaving thousands without electricityFor residents and business owners, the hours without power came with real costs. TMJ4 Janice SmithWe Energies says hundreds of workers remain in the field and most Milwaukee County customers should have power restored today.