Electricity supplies have been interupted to hundreds of homes and businesses
The lights went out in areas of Thornton, Cleveleys and Bispham at around 7.20am today.
The cut lasted just a second in some places but a number of homes and businesses are understood to still be without power.
The loss of power has caused problems on the roads with traffic lights at Four Lane Ends and Singleton junction among those out of action.
As a result there have been long queues on Amounderness Way and Mains Lane, with Highways England warning traffic conditions may not return to normal until around 9.30am.
Electricity North West said engineers were on the way to fix a high voltage fault.
A spokesman said: "An underground cable fault caused 1,393 properties to lose power at 07.22 this morning.
"We restored 813 in under 3 minutes by our automatic restoration systems and engineers are on site working to get power back to the remaining customers.
"For updates, customers can follow us on Twitter (@ElectricityNW) or Facebook, or can call the new free national power cut number 105, which will connect them directly to Electricity North West."