There is not much you can do since this is a professional task requiring a particular skill set to achieve, then furnace leaks need to be attended to before they get out of hand instantly
I first panicked when I noticed some water in my heater; All logic dictated that a boiler should not have any form of moisture, which was a significant problem, but before going into panic mode, I thought about calling my Heating and Air Conditioning worker to confirm that my boiler was not putting me at risk; The Heating and Air Conditioning contractor confirmed that this is normal & may happen with different heaters, it resulted from condensation, which then forms a pool inside the boiler at its base. It turns out that this happens because the condensed water cools & rests inside the heater, but unluckyly, most residential boilers are not high-efficiency boilers with provisions to eliminate & eject the condensed water out of the heater, but such highly efficient boilers used commercially have condensation pipes that eliminate any moisture that forms after use, however when this condensed water is not drained, it accumulates & can pose dire risks to your Heating and Air Conditioning system, but one of the consequences may be corrosion of parts, especially if they are prone to rust. When you realize that the boiler is leaking, the best transport would be to call your Heating and Air Conditioning worker for immediate intervention. There is not much you can do since this is a professional task requiring a particular skill set to achieve, then furnace leaks need to be attended to before they get out of hand instantly. Fortunately, it is not as complicated as several people imagine it to be. All that is needed is to drain the accumulated water & prevent a recurrence of the same. A old Heating and Air Conditioning contractor will help with this.