What is the best way to safeguard your equipment and house?

Unplug your antenna and unplug all your equipment from the mains before a
storm.

As for websites, here is a link to a three-part .pdf article on how to
protect radio equipment during storms. It's aimed more towards amateur radio
operators, but I'm sure much of the info would be helpful to anyone in the
radio monitoring hobby as well.

http://www.arrl.org/tis/info/pdf/0206056.pdf
http://www.arrl.org/tis/info/pdf/0207048.pdf
http://www.arrl.org/tis/info/pdf/0208053.pdf

Good luck and be safe,

Jackie