Jundiaí, a city in São Paulo, Brazil, is implementing a new system of alert sirens for residents living in areas deemed at risk for natural disasters such as landslides. This decision comes after the Civil Defense noted a staggering 278% increase in emergency responses in 2025 compared to the previous year, highlighting the urgent need for improved communication about risks. The alert system aims to notify residents not only of the need to evacuate but also when it is safe to return to their homes.

The initiative falls under the Remote Alert System via Sirens (SISAR), a partnership between the Jundiaí City Hall and the State Government. According to Colonel Gimenez, the coordinator of Civil Defense in Jundiaí, this system is crucial as it enhances their capacity to warn and protect the population who inhabit hazardous zones, thereby reducing risks associated with severe weather events. The sirens will serve as an immediate communication tool for alerts.

The installation of the sirens will occur in carefully selected risk areas, determined by technical experts. The system is designed to activate automatically when rainfall reaches 45 millimeters within one hour, ensuring timely alerts to the community about impending dangers. This proactive approach demonstrates the city’s commitment to safeguarding its residents against the increasing threat of natural disasters, particularly as climate patterns evolve.