Heat Index Table
ADVERTISEMENT
1HEAT INDEX TABLE
This Heat Index Char t provides general guidelines for assessing the potential severity of heat stress (illness). Individual reactions to the heat will vary.
Heat illness can occur at lower temperatures than those indicated on the “Heat Index & Possible Risk” section of this poster.
How to use the Heat Index Chart:
1. Across the top of the chart the air temperature is listed.
2. Down the lef t side of the chart, the relative humidity is listed.
TAKE TEMPERATURE & HUMIDITY READINGS IN THE SUN, IF PRACTICE WILL TAKE PLACE IN THE SUN.
3. Where the temperature and humidity meet on the char t is the Heat Index.
The Heat Index is the body’s sensation of heat, or “What the temperature and humidity feel like to the body.”
AIR TEMPERATURE
(In degrees Fahrenheit)
70
75
80
85
90
95
100
105
110
115
120
o
o
o
o
o
o
o
o
o
o
o
HEAT INDEX or (“What the temperature & humidity feel like to the body.”)
RELATIVE
HUMIDITY
HEAT INDEX & POSSIBLE RISK
0%
64
69
73
78
83
87
91
95
99
103
107
105
111
116
10%
65
70
75
80
85
90
95
100
90-104 degrees: Heat exhaustion, heat
cramps & sunstroke possible with prolonged
105
112
120
130
20%
66
72
77
82
87
93
99
exposure and/or physical activity. Provide
unlimited fluids and monitor athletes for
30%
67
73
78
84
90
96
104
113
123
135
148
signs & symptoms of heat illness.
40%
68
74
79
86
93
101
110
123
137
151
50%
69
75
81
88
96
107
120
135
150
105-124 degrees: Heat exhaustion, heat cramps & sunstroke
likely, and heatstroke possible. Provide unlimited fluids & take
60%
70
76
82
90
100
114
132
149
more breaks, consider altering practice so it is less strenuous
(for football, consider practicing without pads), practicing when
70%
70
77
85
93
106
124
144
the index is lower or cancelling practice.
80%
71
78
86
97
113
136
90%
71
79
88
102
122
130 degrees & higher: Sunstroke & heatstroke highly likely.
100%
72
80
91
108
CANCEL PRACTICE FOR THE SAFETY OF ALL PLAYERS.
Source: National Oceanic & Atmospheric Administration
DIRECTIONS FOR USING THE MANNIX THERMO-HYGROMETER
1) Turn the unit on and hold it by its body. DO NOT HOLD IT BY THE SENSOR!
2) Take the temperature & humidity readings in the same location and conditions as practice or competition will take place.
3) Allow 1 to 1-1/2 minutes for the unit to adjust to the current temperature and humidity. TEMPERATURE AND HUMIDITY MAY STILL FLUCTUATE BY SEVERAL TENTHS OF A DEGREE OR PERCENT.
4) Round the temperature and humidit y to the nearest number provided on the Heat Index Table.
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education