It can be really difficult sometimes to get this kind of thing figured out. You should check any insurance documents that you have. If you can't find the information there, you should talk to your insurance agent. With that help you should be able to figure out if this damage is covered. If it's not you're probably going to need to find a good company to help you put a new fence in place of the old one, or just to repair it if that's all it needs. http://www.leadersfence.com
Akbar, you will need to contact your homeowners insurance and ask if this is part of your coverage. On a typical Homeowner Insurance policy, weather-related damage to your fence is covered under 'Other Structures' - it is also subject to the amount of your deductible.
Fencing is usually covered by the other structures coverage on your policy. If you have wind coverage and other structures coverage then you should be covered. They will pay to replace the fence minus the deductible. You may want to get an estimate first to discover if its even worth making a claim. Every claim can raise your rates for 5 years so you want to make sure it is worth it.