Reinforcing Readiness and Resilience

Shivanand Pandit

On May 2, 2026, people across India were suddenly startled when their mobile phones made a loud alarm sound and displayed a warning message on the screen. For many, it felt like a real emergency and created confusion at first. However, this was actually a planned nationwide test of a new alert system. The trial was organized by the National Disaster Management Authority (NDMA) to check how well this system works in real conditions.

The main idea behind this exercise was to study several important things. Authorities wanted to see how quickly and reliably warning messages could be sent to a large number of people at the same time. They also aimed to understand how many users could actually receive these alerts across different regions and network conditions.

Another key focus was to observe how people react when they receive such sudden warnings—whether they pay attention, feel alarmed, or understand the message properly. This testing is part of a larger plan to improve emergency preparedness in the country. In the future, the same system will be used to send early warnings during real disasters like earthquakes, floods, or cyclones. By alerting people in advance, the system can help them take necessary precautions, move to safer places, and reduce the risk to life and property.

The system uses a method called Cell Broadcast Technology, which is quite different from the regular SMS service people use every day. In a typical SMS system, messages are sent separately to each individual phone number. When a large number of messages have to be delivered at the same time—especially during emergencies—this process can slow down, causing delays or even failures in message delivery. Cell broadcast works in a much more efficient way. Instead of sending messages one by one, a mobile tower sends out a single alert that is received by all mobile phones connected to that tower within a certain area. This means that thousands or even millions of people can get the same message at almost the exact same time. Because this method does not rely on individual message delivery, it prevents the network from getting overloaded. Even if many people are using their phones at the same time, the alert can still be delivered quickly and smoothly. Another important point is that these messages are not saved or placed in a waiting line for later delivery. They are simply broadcast for a short period and received instantly by active devices, which helps keep the network free from extra traffic and ensures faster communication during critical situations.

System Benefits and Associated Constraints

A key advantage of this system is that it can send alerts only to selected areas instead of the whole country. Officials have the ability to decide exactly which locations should receive a warning, based on where a risk is expected. This means alerts can be limited to certain regions, cities, or even smaller zones covered by specific mobile towers. For instance, if a cyclone is likely to affect coastal areas, the warning will be sent only to people living in those regions. Those staying in inland or safe areas will not receive the alert. This makes the system more accurate and useful, as people get information that is directly relevant to their situation. By sending messages only to those who are at risk, the system helps avoid confusion and unnecessary fear among others. It ensures that warnings are meaningful, timely, and focused on the people who actually need to take action.

Another important benefit of this system is that it works across all kinds of mobile networks, whether it is 2G, 3G, 4G, or 5G. It does not depend on an internet connection, so even people who are not using mobile data or Wi-Fi can still receive the alert. This makes it especially useful during emergencies, when internet services may be slow or unavailable. When an alert is sent, it immediately shows up on the phone screen in a clear and noticeable way. At the same time, a loud sound or alarm is played so that the user’s attention is quickly drawn to it, even if they are not actively using their phone.

Although the message is transmitted as text, most modern smartphones have a feature that can read the message out loud. This is done using built-in text-to-speech technology, which converts written words into spoken audio. Because of this, people can hear the warning even if they do not read it right away. This feature is particularly helpful for those who may have difficulty reading the message quickly, such as elderly users or people who are busy at the moment. In addition, the system can support multiple languages based on the settings of the phone. This ensures that users receive the alert in a language they understand, making the warning clearer and more effective for people from different regions.

That said, the system is not free from constraints. For instance, alerts will not reach users if their mobile phones are switched off, set to airplane mode, or located outside the coverage area of the relevant network. In addition, certain older or basic mobile devices may not be compatible with this technology. Another limitation is that these alerts are not stored for later access; therefore, individuals who fail to notice the notification during the broadcast window will not be able to retrieve it afterward.

The system has been developed by the Centre for Development of Telematics (C-DoT) in alignment with internationally accepted standards, ensuring that it functions seamlessly across various telecom networks. It also works in conjunction with India’s earlier alert mechanism, SACHET, which has already demonstrated its effectiveness by disseminating billions of SMS alerts in multiple Indian languages during previous emergencies. The growing significance of such an alert system is evident given India’s vulnerability to natural disasters such as floods, cyclones, and extreme heatwaves. In these situations, timely dissemination of information can play a decisive role. Studies have consistently shown that even a short lead time—sometimes just a few hours—can significantly reduce loss of life and property by enabling people to take precautionary measures or evacuate to safer locations.

Issues Ahead and the Way Forward

Despite its advantages, the system still faces several challenges. One major concern is the uneven distribution of mobile network coverage, particularly in rural and remote regions, which could limit its effectiveness. Additionally, not all mobile devices are equipped to receive such alerts, and in some cases, users may need to manually enable specific settings to ensure they receive notifications. Another critical issue is the reliability and precision of the alerts themselves. If warnings are issued too frequently or are based on inaccurate data, there is a risk that people may become desensitized and begin to ignore them—a phenomenon commonly referred to as “alert fatigue.”

Inclusivity is another important aspect that requires attention. Vulnerable groups, including the elderly and individuals with disabilities, may find it difficult to interpret or respond promptly to digital alerts. To address this gap, it is essential to integrate mobile-based warning systems with traditional communication channels such as radio announcements, sirens, loudspeakers, and community-based networks. This multi-layered approach can help ensure that critical information reaches all sections of society.

Moreover, issuing alerts alone is not sufficient; public awareness and preparedness are equally crucial. People need clear guidance on how to respond when they receive such notifications. Experiences from countries like Japan and the United States highlight the importance of regular awareness campaigns and well-defined instructions. It is also beneficial to categorize alerts based on severity—such as advisory, moderate, or extreme—so that individuals can better understand the level of risk and act accordingly.

In conclusion, this new alert system marks a significant step forward in strengthening India’s disaster management framework. However, to maximize its impact, authorities must focus on enhancing the accuracy of predictions, expanding device compatibility, improving outreach to underserved regions, addressing the needs of vulnerable populations, and educating citizens on appropriate response measures during emergencies.