People in Broward County, Florida have one more map to rely on this weekend as Hurricane Irma passes through the state. MIT has launched RiskMap, a crowdsourced platform meant to track and map flooding by relying on people's social media reports, as a pilot project. The county's residents can update the map by contacting its Twitter DM, Telegram and Facebook Messenger chatbots. They'll then have to submit their location, a description of its conditions and a photo showing its current flood level. Other residents and officials planning evacuations or sending help can then see those updates on the map as they go live.