Scorching summer sun is just the right ingredient for weeds to get crazy and out of control. Luckily, there's no need to spray your sidewalk or pavers with yucky chemicals. Boiling water or vinegar will do the trick. If you don't have a sprayer, go for the boiling water. Sprayer in hand, vinegar will do just fine.
You won't see results immediately, but give it a day or two and those weeds will be wilting, wilting, gone.