Gravity variations foretell flood risk months in advance
Satellites can monitor saturated river basins to forecast disasters
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/07/ts_missouriflood_feat_free.jpg?fit=860%2C460&ssl=1)
FLOOD WARNING Gravity variations from the sodden Missouri River basin could have predicted this 2011 flood months in advance, scientists say.
North Dakota National Guard/Flickr (CC BY-NC-SA 2.0)