You’re seeing sunset light behind these glorious blooms, which I think are flame azaleas (Rhododendron calendulaceum). All azaleas are rhododendrons (botanically); but not all rhodos are azaleas. Good luck if you find this confusing.
These are from the mountains, so are “farther back” in the springtime. Meanwhile, the bright fuschia ones in our front yard are beginning to wilt.