If you live in Michigan and your household internet access is via a wireless link, watch out for ice storms. The ice will collect on your antenna and take your internet connection down.
If above-mentioned situation with ice on an antenna exists, a hairdryer is an effective tool for removing the ice.
A pretty wicked ice storm came through here yesterday and our internet connection went down yesterday afternoon. When we woke up this morning everything was covered with ice, it was quite an amazing sight. Clearing the antenna took about 20 minutes outside up on the ladder with an extension cord to plug the hairdryer into, but the ice is gone and our internet connection is back online. 🙂