Siblings, 4 and 2 years old, die after being swept away by quick-moving California stream

Two young siblings out for a picnic with their mother died Monday after being swept up in a rapidly flowing stream, California authorities said.

The mother, her 4-year-old daughter and 2-year-old son were spending the afternoon at the Thurman Flats Picnic Area near Mill Creek when the tragedy occurred, the San Bernardino County Sheriff's Department said Tuesday.

Officials said the mother had been occupied with her son when her daughter "was taken" down a fast-moving stream around...