Conditions will deteriorate across Hawaii this weekend as Darby delivers locally heavy rain and rough surf. But the tropical storm will provide long-term benefits.
Lightning killed a teenager on Friday, the second teen lightning death in three days. With thunderstorms continuing to rattle several parts of the nation, more lives will be at risk.
Throughout the duration of the 2016 Summer Olympics in Rio de Janeiro, one group of athletes will be paying close attention to the weather forecast and, in particular, the wind as they go for the gold.