Bradford Pear tree leaves turning black
Your Bradford pear has a bad case of fireblight. The recommended procedure is to prune out the dead tips now, then prune each infected branch again lower down when it is dormant in the winter:https://extension.umd.edu/hgic/ugly-stub-pruning-fire-blight
Obviously, that's not going to work well when a tree has such extensive infection.
Bradford pears (and all the ornamental callery pear trees) are very problematic trees. Usually the problem is that the branch structure is weak, and when it gets a nice mature size the branches start breaking off. (Yours has this typical branch structure.)
It is also a foreign invasive tree, which has spread by the hundreds of thousands into park and wild areas of Maryland. We don't recommend it anymore.https://extension.umd.edu/hgic/bradford-pear
And now they tend to get more and more diseases. You might want to consider replacing it.