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Geographic Information Systems (GIS), for example, are helping local governments identify flood zones on maps, measure communities' vulnerability to flooding, and plan for new flood-prevention infrastructure like drainage systems and levees. Through mobile phones, citizens are being alerted via SMS texts to coming floods or cyclones. And Early Warning Systems are simulating weather patterns and predicting disasters in advance. These tools, according to Relhan, can play a pivotal role in ultimately saving lives and lowering recovery costs.