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H
E
A
T
 
I
N
D
E
X
 
     
C
H
A
R
T
     
     
T
E
M
P
  (F)    
Relative
Humidity
70
75
80
85
90
95
100
105
110
115
120
0%
64
69
73
78
83
87
91
95
99
103
107
10%
65
70
75
80
85
90
95
100
105
113
116
20%
66
72
77
82
87
93
99
105
112
123
130
30%
67 73 78
84
90
96
104
113
123
135
148
40%
68
74
79
86
93
101
110
123
137
149
50%
69
75
81
88
96
107
120
135
150
60%
70
76
82
90
100
114
132
149
70%
70
77
85
93
106
124
144
80%
71
78
86
97
113
136
90%
71
79
89
102
122
100%
72
80
91
108
Sunstroke and Heat Exhaustion  are likely 
when the heat index reaches 105 F.