If you want to keep your household operations intact in case of a power supply issue, then buy relevant tools for leakage current test as well as other issues that are likely to show up without any prior warning. You can buy such tools online or offline depending on your requirements, but make sure you have them before they are needed.

Alternatively, you can also contact an electrician nearby who has access to the latest electric tools to test current flow in your home and provide you with necessary solutions whenever you need any help.