First, your laptop is only in danger if it is connected to an external power source, your DSL cable IS an external power source. The short answer is, unplug everything if you are truly concerned.

You can purchase a special surge protector that will work as a "middleman" between the power sources and your computer. Basically, you plug your devices into the surge protector instead of the wall. The type of surge protector I am speaking of has a phone filter plug that will also protect your phone line, modem, and your DSL line.

Because we have no way of knowing how your power systems work down there, you might be well advised to seek local information from a trusted tech supplier. My home is electrically grounded and has more modern electrical building codes in place, your case may be very different so guidance from overseas might not be applicable.

A wireless connection CAN carry a surge, but it's unlikely. However, I'm in the camp of "better safe than sorry" so when we're facing a significant storm, I might just go unplug the surge protector, thus disconnecting all of my equipment from external power sources at once.

Hope this helps a little, Anne.