They aren't dead yet but they do look pretty sad. My Uncle, who grew the most incredible Azaleas, had a theory that's always worked for me. If the Azalea isn't performing, rip it up and replant. He literally ripped them out of the ground! I don't do that but I do dig them up. The idea of the whole thing is that you will add fresh soil, peat and nutrients when you replant.
Azaleas require a pretty acidic soil to be happy. Mine are always happy until they grow out of the hole full of garden soil and peat and into the native soil (I live in an alkaline desert). But even if your native soil is not alkaline, you need to mix about half peat into the planting hole. Make sure it is completely moist so you don't burn the roots. Your soil should have a pH of between 4.5 - 5.5. Higher than that, the Azaleas will sicken and eventually die. Peat is low in nutrients so fertilizing with Azalea food is a must.