Vulnerability of populations and the urban health care systems to nuclear weapon attack – examples from four American cities

Table 1 Intensity of thermal fluence by thermal effect type

Type of Thermal Effect	20 Kt Device Thermal Fluence Calories/cm2	550 Kt Device Thermal Fluence Calories/cm2
Mass Fires Virtually Certain	25	25
Mass Fires Likely	13	13
Mass Fires Possible	10	10
3^rd Degree Burns (50% chance)	7.6	9.4
2^nd Degree Burns (50% chance)	5.0	6.2
1st Degree Burns (50% chance)	2.5	3.1

ISSN: 1476-072X