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Yes, you should be concerned about lightning. A Google search on grounding and lightning protection will get you information.
Here is a link to start:
I cannot claim expertise on this subject, but I can tell you my experience. I have an amateur station and use two antennas. One is a dipole 20 feet up in the trees behind my house, the other is a 2 meter vertical mounted to my chimney. I also have a DSS dish on the roof. All three of these were installed according to our local (and national) electric code which states that the lead wires and masts be grounded as close as practical to the electrical service ground stake when entering the building. I was able to ground all three (easy because they are coaxial leads….just ground the shield using an approved coaxial ground connector) directly to the electrical service ground stake where they enter my house. The idea here is to have a single point ground.
If you read the link above, you will see a discussion of this. Putting wires in trees and ground stakes all over the place does not conform to the single ground approach and can make things worse.
About four years ago I had a lightning strike. It hit a large ash tree next to my porch. The tree was 10 feet from the ground stake, and my dipole lead was buried within 3 feet of the tree. I was standing in my house watching the storm through our french door windows and was also about 10 feet away. The tree exploded, throwing large branches and bark thirty feet across the yard, and the concussion damaged the roof of my porch splitting a 4 x 8 roof beam. I saw a ball of plasma lightning which looked like a basketball on fire slowly bounce across my yard away from the house. My neighbor saw this too.
Most of the electrical damage was to our telephones. I lost 3 cordless phones, and two modems which were connected to the line. No damage to my computers and no damage to my radios or DSS equipment, which I attribute to the single point grounding (and some luck).
The best thing is to disconnect and ground any wires going outside BEFORE the storm arrives. Don’t even think of it while lightning is active. You could be damaged.
There are no guarantees with lightning, only some steps you can take with proper grounding to limit the damage.