Honey Locust - dying branches
I have 2 large honey locusts in my backyard. I am located in northern AZ (hot summers and colder winters). Both had been doing great for the last few years. Last year I noticed a few dead branches. This year it has gotten worse. Unsure what is going on. Any help is very appreciated! I have taken a few photos - some up close and overall photos. I can add more if there are any specific requests.
Trees get full bright light. Watering consists of biweekly heavy watering and daily sprinklers due to grass being watered in vicinity.
Side note: I have a pear tree (can be seen in an overall pic) that has been suffering with blight but I believe I have gotten it under control fingers crossed. Unsure if this could have something to do with the locust issues?