A New Hampshire fire chief who helped triage 23 Boy Scouts who suffered burns during a campground lightning strike says they were ‘‘incredibly calm’’ throughout their ordeal. ‘‘No one was screaming or yelling; whatever we asked them to do, they did,’’ Belmont Fire Chief David Parenti said Tuesday. Parenti said the Scouts, ranging in age from 12 to 17, had burns of varying degrees of severity from Monday’s lightning strike. No one was directly hit, but some Scouts and three adults complained of tingling and burning sensations, said Greg Osborn, spokesman for the Boy Scouts. The lightning struck during an evening storm at Camp Bell, a remote campground of the Griswold Hidden Valley Scout Reservation in Gilmanton. Camp Bell has no structures in which the scouts could have sought shelter, Parenti said. They were under a canopy when lightning struck nearby.