A new early warning system has been launched in Latvia to address the increasing flood risk due to snowmelt and heavy precipitation. The system, building on a previous sensor-based application operating in the city of Jelgava, will deliver alerts to residents and authorities in the Zemgale region, a flat territory with dense river network. It received funding from the Horizon 2020 IMPETUS project and was an outcome achieved due to collaboration of the Jelgava Digital Center, the Zemgale Planning Region, the Latvian Environment Geology and Meteorology Center and the Baltic Environmental Forum.