Natalie Mering’s new album, “And in the Darkness, Hearts Aglow,” redirects the sounds of late ’60s and early ’70s West Coast folk-rock to a 2023 concern: pandemic isolation.

Natalie Mering’s new album, “And in the Darkness, Hearts Aglow,” redirects the sounds of late ’60s and early ’70s West Coast folk-rock to a 2023 concern: pandemic isolation.