Posted on May 15, 2018, Edited May 18, 2020 by Debbie Michael Public Alert Service through Waukesha County Waukesha ALERTS! Sign Up below to receive emergency alerts from Waukesha County– a free service for our residents. This service, powered by AlertSense, allows fire, police and other emergency response agencies to issue emergency alerts to warn citizens of events such as need for immediate evacuation, crime/imminent danger, and local area emergencies. Since many households no longer utilize traditional land-based telephone lines, we urge all individuals and businesses in the county to register and provide your additional contact methods to ensure that we can alert you in the event of an emergency. Sign Up for Public Alerts