Riverside cities in Quebec will be better prepared to manage flooding this spring thanks to LoRaWAN technology. X-TELIA has just launched its new river level sensor. The wireless (LoRaWAN) device can operate on batteries for 20 years without recharging or battery replacement. Instead of travelling several times day and night to the riverbank to see if the water has risen, the municipal employees concerned will now receive alerts on their smartphone as soon as the water level has reached a critical threshold. Citizens will therefore be notified quickly to avoid any danger. LoRaWAN technology is less expensive and consumes 2.5 times less energy than LTE-M, which has just been launched in Canada by some mobile operators. It is without a doubt the ideal technology for smart cities that want to read water or gas meters, track fleets of vehicles or non-motorised assets, detect overflows in sewers, measure air quality, etc.