Many parts of Inishowen were left without power as snow storms and thunder and lightening hit the peninsula.
A power outage in Newtowncunningham after 12pm on Wednesday left 270 customers without electricity.
Many more householders in the areas of Burnfoot and Bridgend were also affected but it is understood power was restored there just before lunchtime.
The ESB confirmed to the Journal that a further outage in Buncrana on Wednesday morning was due lightening and affected 600 customers from about 8:30am to 11:00am. It is understood customers in the Clonmany area were also affected.
On Tuesday night, a lightening strike also caused a power outage in Moville and Gleneely at around 9.15pm, affecting 300 customers.
Crews from ESB Networks were immediately dispatched and supply was restored to everyone by 11:30pm.
A spokesperson for ESB Networks reminded the public that if you see any damaged Network, do not touch or go near it. Please ring 1850 372 999 immediately. Real time updates on power outages are available from their free app Powercheck.ie.
Many schools across Inishowen remained closed on Wednesday morning as the peninsula was hit by heavy snow and plummeting temperatures.
A large number of secondary roads were also impassable, with AA Roadwatch warning motorists to avoid the Mountain Road between Buncrana and Carndonagh.
While forecasts say the worst of the snow is over, very strong winds are forecast for Wednesday afternoon and overnight.