The flights will continue from 8 a.m. to 4 p.m. on Wednesday, Thursday, and Friday.
Helicopters will survey these towns: Bethel, Bridgeport, Brookfield, Danbury, Darien, Fairfield, Greenwich, Newtown, Norwalk, Redding, Ridgefield, Stamford Weston, and Wilton as well as other areas out state.
Eversource uses two helicopters: A blue and white helicopter with tail number N411DD and a blue and silver helicopter with tail number N1431W.
Crews will check the high-voltage lines as well as for tree limbs or branches that could damage lines.
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