One study from 2020 imagined a nuclear war between India and Pakistan, where the countries would exchange roughly 100 detonations similar in size and impact to Little Boy, the one that was sent to destroy Hiroshima (aka 15 kt yield each). If the regions would send the A-weapons to each other’s most populated urban areas, each neutron bomb would incinerate a zone of 105 miles.
In addition to that, this hypothetical scenario would generate 5 Tg (teragrams) of smoke and ash from wildfires and would cause several buildings to catch fire and produce even more disasters.
…Yield is typically measured in terms of the number of conventional explosives (TNT) that would be necessary to create a similar amount of energy. The units that are used are equivalent kilotons (KT) or megatons (MT), where one kiloton equals the energy generated by one million tons of TNT.