The entire country has had high humidity. have you drained the tank lately? I hate to hear explosions!!

There is more to tank failure then draining the water.

And you get water in your tank regardless of ambient humidity.

Best gadget to keep your tank dry is an auto drain. Opens the drain valve each time the compressor stops or starts. Cheap as chips, a bit fiddly to install if mechanical. Electronics are a bit dearer and easier to install. You get almost no water under the tank. 

No guarantee against explosions.