A power surge in Chessington knocked out nine rides at Chessington World of Adventures (CWOA) and affected 219 people elsewhere in the area.
Residents in Cox Lane reported loss of power after the surge, which happened at about 12.50pm.
A CWOA spokeswoman said all rides had been restored to working order.
Guests using the affected rides were rescued by 1.15pm, she added.
A UK Power Networks spokeswoman said: "UK Power Networks engineers worked as quickly and safely as possible to restore electricity to customers in the Chessington area following an underground cable fault today.
"We understand how difficult it can be without power and apologise for any inconvenience."
Power was restored to all 219 affected customers by 1.26pm, she added.
- Were you affected? Call the newsdesk on 020 8722 6313.
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