Unless you need to have your desktop computers and printers on for a reason today, turn them off. You might want to unplug them. A lightning strike nearby will go right through a surge protector or even a UPS. If you can work with a laptop, tablet or phone, do that. Really bad weather today and if I hear that your computer fried because you couldn't stop playing Candy Crush Saga or checking WeatherBug, I will be rather upset (and you go to the back of the line!). Good luck today and I hope you all stay safe.
