Loud buzzing coming from fuse box.

[giddyup]

We're just experiencing very heavy rain in Pattaya at the moment and suddenly the fuse box (inside the house) is making a loud buzzing sound. I'm only guessing but I assume water has entered somewhere into the electrical system?

[Crossy]

Assuming you have breakers rather than fuses try turning them off one at a time until you find the one that's buzzing.

 

If it is the wet got in somewhere it may clear when the rain stops. Then it's time to find the ingress point.

 

[Kwasaki]

A connection to a fuse box or breaker that has progressively got in a state of looseness due to expansion & contraction.

[giddyup]

1 hour ago, Kwasaki said:

A connection to a fuse box or breaker that has progressively got in a state of looseness due to expansion & contraction.

The problem is not with the fuse box but with water entering a connection outside the house, probably the gate post lights.