A firefighter sprays down the smoldering remains of a burning home during the Hillside Fire in the North Park neighborhood of San Bernardino, Calif., on Oct. 31, 2019. Some wildland firefighters worry whether they can do their jobs safely during a global pandemic.

A firefighter sprays down the smoldering remains of a burning home during the Hillside Fire in the North Park neighborhood of San Bernardino, Calif., on Oct. 31, 2019. Some wildland firefighters worry whether they can do their jobs safely during a global pandemic.