No injuries or deaths have been reported, but multiple buildings used by the school were damaged.
Daris Larson of Nunapitchuk, age 37, is being charged with attempted murder in the first degree.
The victim, whose name has not yet been released, was medevaced to Bethel and is reportedly in stable condition.
COVID-19 lockdowns have left students and their families navigating new technology on their own.
Nunapitchuk used federal CARES Act funds to pay people who tested negative to run errands for others who were locked down at home.
Four communities in the Yukon-Kuskokwim Delta currently have community spread of the coronavirus and 31 communities have had at least one COVID-19 case.
Quinhagak, Kipnuk and Kasigluk entered lockdown after residents tested positive for COVID-19.
The Justice Department committed millions of dollars to improve public safety in rural Alaska after a trip U.S. Attorney General William Barr made to the region in May 2019.
Kasigluk couldn’t get help from nearby villages to fight the flames because the community is locked down to prevent the spread of COVID-19.
YKHC says the person was in Bethel when the hospital tested them positive for coronavirus.