Table 4.

Threshold values of heat stress among cows based on CCI (based on Mader et al. 2010)

Environment conditions	Animal susceptibility
	Hot conditions	Cold conditions
		High	Low
No stress	< 25	> 5	> 0
Mild	25 to 30	0 to 5	− 10 to 0
Moderate	> 30 to 35	< 0 to − 5	< − 10 to − 20
Severe	> 35 to 40	< − 5 to − 10	< − 20 to − 30
Extreme	> 40 to 45	< − 10 to − 15	< − 30 to − 40
Extreme danger	> 45	< − 15	< − 40