The West's reliance on imports could prove problematic during summer heat waves or when hydroelectric generation dries up because of drought, WECC said.

ERCOT is bracing for the second major cold front of the year, issuing an operating condition notice for Thursday and Friday ahead of “extreme cold weather.”

An ISO-NE study warned that DERs with older inverters that don't allow them to ride through faults could trip during high solar output and low demand.