Engineers drafted in from all over the country are still working to get power back on in 48,000 homes in the Anglia region after Monday's storm.
The main areas still with power cuts are in Hertfordshire, Essex and Suffolk.
The power supply company UK Power Networks says it has 900 engineers on duty repairing the damaged network to restore power to customers as soon as possible. That is six times the usual number on duty with staff drafted in from Yorkshire, Liverpool, South Wales and the Midlands.
UK Power Networks says it's the biggest storm it has had to cope with since 2002 and at its height 620,000 households lost power in the East and South East.
The company says Bedfordshire, Buckinghamshire, Norfolk and Cambridgeshire are now back to normal.
Anyone spotting a damaged power line is urged to report it to UK Power Networks but to stay well clear. The number is 0800 783 8838.
The company took 157,000 calls during Monday.
UK Power Networks said: "The electricity network is built to be resilient but extreme weather can see wind-borne debris being blown onto our overhead power lines. We activated the early stages of our emergency plans on Friday and brought in additional staff covering engineering, technical and call centre roles."