On July 27, a new NASA spacecraft was put in operation, in orbit between earth and the sun, to monitor the solar wind.
// DSCOVR (Deep Space Climate Observatory) was launched on February 11, 2015, and reached final orbit on June 8, 2015 orbiting a position located 1 million miles toward the Sun from Earth. At this special location the spacecraft always remains between the Sun and the Earth where it serves as a distant early-warning sentinel, like a tsunami buoy in space, to alert NOAA of incoming eruptions from the Sun.//
We will only get a few minutes of warning of the event, however, since it can take minutes to a few hours for the particle storm to reach earth. The dangers are mostly to spacecraft and satellites.