Usually, gardeners welcome rain, but if your soil doesn’t drain sufficiently well, there's a risk of downpours delivering too much of a good thing. After all, waterlogged soil deprives roots of necessary oxygen. If drainage doesn’t relieve the saturation level quickly enough, most plants die. True, there's no way to undo damage from a deluge after the fact. But over the long term, there's a lot you can do a lot you can do to protect your garden from future storms. Your best bet? Add compost to your soil on a regular basis. Compost provides numerous benefits, but not least is that it attracts earthworms, whose tunneling slowly but surely creates air pockets and channels that boost drainage dramatically.