Machine learning allows for more accurate disaster mapping.
across the entire country and into parts of Bangladesh in 2020. By 2021, Google had sent flood notifications to 23 million people in the two flood-prone countries. That service will now reach 15 countries in Africa and three more countries in Asia and Latin America.
The alerts go out to Android phone users and any phone with the Google search app installed. Companies and organizations can also sign up to receive the service, but people need to have access to the internet and enable their Google location services on their phone to receive the flood alerts. Before Google can send out an alert, it has to first predict where flooding is likely to happen and how deep the water will be. To make predictions where less data is available, Google turned to an AI technique called transfer learning. Essentially, the researchers train a flood forecasting model using data from many different drainage basins.
Previously, Google had to rely primarily on data from water level gauges. Now, the main driver of the model is weather forecast data rather than water level gauges. That update allows the company to now issue flood warnings up to a week in advance, compared to around 48 hours previously, according to Sella Nevo, senior staff engineering manager at Google.debuting today is an interactive map that people can use to look up flood forecasts for themselves.
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