Rainy relief

We have been alternating sweltering heat and occasional downpours for a couple of weeks now and it is stimulating all the late crops in the area.  Unfortunately, it also causes tipburn in lettuce and romaine and accentuates any problems other crops are experiencing.  It also causes a weed bonanza for those of us who don't use herbicides.  The galinsoga and pigweed go from seedlings to vegetable killing monsters in a few weeks.  Beds I assumed would be safe to stop weeding are now threatened by the aforementioned killers.  I have resorted to topping them in some beds of onions to at least arrest their growth so I can harvest the onions.  It's going to be a long couple of weeks until we get to September, when the weeds tend to slow down.