The last few weeks have been particularly rainy in much of Spain and Europe, with saturated soil and rivers heavily laden with water in many river basins. In this context, more and more people are looking for tools that allow them to know, at a glance, if their neighborhood, town, or vacation area may be affected by flooding in the coming days.
Google has put forward an interesting solution: a global flood risk map based on artificial intelligenceAccessible via web browser and designed to allow any user to check, almost in real time, where there is a risk of river overflows or flash floods, this platform, called Flood Hub, is becoming a key resource for monitoring extreme rainfall events.
What is Google's flood risk map?
Google has developed two complementary viewers related to floods: on the one hand, the Google Research experimental flood map (sites.research.google/floods)and on the other hand, Flood Hub, the main center where globally focused forecasts are displayed. Both are part of the same effort to translate complex data into easy-to-interpret maps for the general population, emergency services and government agencies.
If you access Google's flood research website, a world map with a side column of layersFrom there you can activate or deactivate visualizations, zoom in on any region, and switch to hybrid view to overlay satellite images. The points and areas marked in color visually indicate... where the greatest risks are concentrated of extreme flash flooding or river flooding.
Clicking on any of those points opens a panel with More information about the eventThis includes information on the projected evolution of the outbreak, key dates, estimated affected population, and even the data source used. It's a quick way to understand whether it's an emerging outbreak, an ongoing outbreak, or one in remission.
In parallel, Flood Hub acts as the “Google Maps of the floods”Its objective is very similar: to represent on an interactive map the level of risk of river flooding and flash floods, with a very simple interface that anyone can handle even from a mobile phone, without installing additional applications.
How Flood Hub works: AI to predict floods and flash floods
At the heart of Google's flood risk map is a system that It combines classic hydrological models with artificial intelligence algorithms.The platform integrates rainfall forecasts, river flows, satellite images, historical flood data, and other public sources to generate a forecast that is as close to reality as possible.
Flood Hub uses two main AI models that work in a complementary way. On the one hand, the Hydrological model estimates how much water will flow through the rivers In the coming days, the model will process data such as rainfall intensity, basin conditions, and potential snowmelt. This model will produce a short-term water level forecast.
On the other hand, the Flood Model, which translates those projected flows into specific areas that could be floodedIt simulates how water would spread across the land, taking into account the topography, orography, and local characteristics. In this way, we not only know that a river can rise, but also Which neighborhoods, rural areas, or urban areas are most likely to be flooded?.
This entire process relies on machine learning techniques that allow Adjust forecasts as new weather and sensor data becomes availableThe result is maps that are frequently updated and can offer a window of anticipation of up to seven days In many cases, this allows time to prepare for evacuations or protect critical infrastructure. You can see related developments in Google predicts the weather more accurately thanks to AI.
Additionally, Flood Hub includes a specific feature for flash floods in urban areasIn this mode, the system shows the probability of intense flooding occurring in the next 24 hours, differentiating between probable and very probable situations, something especially useful in cities where a short but intense downpour can cause real havoc.
How to check the flood risk in your area
Accessing Google's flood risk map is relatively simple. You don't need to install any app or have Google Maps on your mobile phone.Simply open your browser and go to the Flood Hub website. From there, the interactive viewer will appear with the global map and the different risk levels marked by colors.
The interface is very similar to any other Google Maps service. You can move around the map, zoom in or out To see details of a specific area and directly search for the name of a town, city, or region, you can zoom in. As soon as you zoom in, colored boxes or dots will appear indicating the expected location.
The legend is key to understanding the map: Flood Hub uses a color scale ranging from normal conditions to extreme dangerAlthough it may vary slightly depending on the view, it is common to find:
- Green: normal situation, with no special risk of flooding.
- Orange or intermediate shades: level of advertisements, with the possibility of flooding that should be closely monitored.
- Red: situation of peligro, with a significant risk of flooding.
- Dark red: extreme danger, associated with severe flooding scenarios.
- White or gray In some areas: zones with no data available or outside the coverage area.
Clicking on a colored area opens a box with additional details: type of event (fluvial or sudden), approximate population affected, estimated start and end datesand even how the risk is changing over the next few days. This information allows for a fairly clear idea of whether the episode is just beginning, at its peak, or in a retreat phase.
If you frequently use the map, you can Add a shortcut to Flood Hub to your mobile home screenOn Android, for example, simply open it in Chrome, tap the three-dot menu, and select "Add to Home screen." This way, you'll always have the icon handy to check the flood risk in seconds and complement it with... rain alarms on Android.
Spain and Europe on the map: storms, swollen rivers and critical zones
The Flood Hub deployment already covers around 80 countries and rivers that affect some 400 million peopleAnd Spain is among the covered territories. In recent winter storms, the tool has gained prominence because It allows you to see at a glance which areas of the peninsula are most exposed to floods.
In scenarios of extraordinarily persistent rainfall, such as those that have left accumulations of up to 300 liters per square meter in some placesThe map tends to color large areas of river basins with warning or danger levels. Regions of the western Iberian Peninsula, the Guadalquivir Valley, or the Atlantic coast may appear with heightened alerts when the ground can no longer absorb more water.
Cases like this Guadalete River overflow in Jerez de la FronteraWith record levels that have forced the evacuation of several neighborhoods, these events illustrate why a viewer of this type is so useful. In situations of saturated soils, reservoirs at capacity, and successive storms, Anticipating potential upstream floods can make all the difference when organizing evacuations or planning controlled releases.
Andalusia is a recent example of a region subjected to severe water stress in winter: Reservoirs near 100% capacity, continuous releases, red alerts for heavy rains in areas like Grazalema and at risk of flooding in sections of the Guadalquivir River. In Flood Hub, these situations are reflected with red or dark red boxes over the main river basins, as well as icons indicating expected flash floods in urban areas of cities like Seville, Cadiz, Huelva, and Malaga.
The map is not limited to Spain. Similar patterns can also be observed across Europe. sensitive areas in countries with recurring floodingFrom the heart of the continent to regions of the Mediterranean where cut-off lows and torrential storms are increasingly frequent, the tool helps compare how storms evolve in different territories and provides a better understanding. the impact of extreme phenomena on a regional scale.
A support tool for Civil Protection, not a substitute for official warnings
Despite its reach and sophistication, Google insists that The flood risk map is for informational purposes only.The forecasts are approximate and, like any model-based tool, are subject to uncertainty. Flood Hub and other Google viewers are not intended to replace Civil Protection or official alert systems.
His role is more that of add-on to anticipate risk scenarios and help both authorities and citizens have a clearer picture of what might happen and where. For critical decisions—road closures, mandatory evacuations, school closures—the references continue to be the warnings from organizations such as the AEMET, the river basin authorities or the regional emergency services.
The advantage of Flood Hub is that it offers a global and near real-time imageThis tool can be very useful for governments, NGOs, and rapid response teams. These actors can use the viewer to identify potentially affected areas, prioritize resources, plan access routes, and better coordinate with local communities.
From a citizen's point of view, using the map can be useful for to compare the information received through other channelsIf your area is under a high-risk warning and official services begin issuing recommendations, it's a clear sign that you should take extra precautions, check garages, basements, or low-lying areas, and stay tuned to announcements.
Google emphasizes that the tool has been developed in collaboration with local experts and organizations on the groundThis is key to adapting the models to the reality of each country. Even so, the company acknowledges that artificial intelligence does not completely eliminate the margin of error, but rather improves the ability to anticipate events compared to traditional methods based on only a few monitoring stations.
Advantages and limitations of Google's flood risk map
Among the map's main strengths, it is worth noting that It offers a very simple visual language.Even someone without technical training can quickly find their way around thanks to the colors and the summarized information that appears when clicking on each area. This lowers the barrier to accessing data that was previously scattered or difficult to interpret.
The other big advantage is the anticipationBeing able to see several days in advance if a nearby river might experience a significant rise allows buy time to take actionFrom planning preventive evacuations to protecting equipment, moving vehicles from low-lying areas, or adapting work shifts in particularly exposed areas.
It is also relevant that the platform It is updated daily (or even more frequently)incorporating new weather forecasts and sensor data. The map is not a static snapshot, but a dynamic system that adjusts its forecast as the atmosphere changes and heavy rainfall is recorded or ruled out.
Among the limitations, it is important to keep in mind that Not all of the Earth's surface is equally covered.There are regions with less available data, basins with limited instrumentation, and countries where measurement networks are still under development. In these areas, Flood Hub displays less detail or offers no information at all.
Furthermore, urban flash floods are very complex phenomena, conditioned by factors such as sewage systems, pavement type, or small variations in terrain. Although AI greatly improves prediction, there can always be deviations. Regarding what actually happens on the street. Therefore, the map should be seen as a valuable aid, but not as an absolute guarantee of what will happen on every corner.
In a context of successive storms, downpours that leave large accumulations of rain and rivers at their limit, Google's flood risk map has become a very useful tool for to better understand which areas of Spain and Europe are most exposedIt won't prevent rain or river flooding, but it does offer an important advantage: visual, accessible information with some advance notice so that citizens, authorities, and emergency services can better prepare before the water arrives.
