Heat Crisis · Bangladesh Poultry
Heat Waves : 
The Chickens
Can't Sweat.
Can't Sweat.
Heat + Humidity = THI. When it crosses 73, broilers lose 29% of feed intake. At 80, body weight gain drops 53%. In Bangladesh, this happens every summer — silently, across every region.
"Pathway Intermediates surveyed real climate data in Bangladesh by published article. So farmers have a Number — not a guess — when the heat season hits."
— Ralph Kim (Regional Manager)
What is THI? ▼
Temperature-Humidity Index — one number that tells you how much heat stress your flock is actually under. Not just temperature. Temperature and humidity combined.
Chickens can't sweat. They pant to cool down. But when the air is hot and humid, panting stops working — and the body starts shutting down. Less eating. Less growing. More dying.
Heat Calendar
Monthly Heat Stress
by Region — Bangladesh
by Region — Bangladesh
Select region — Bangladesh
Click a region to explore real THI data by area.
Monthly average THI — Northwest Region
Click a month to explore the data
No stress (<72)
Mild (72–78)
Moderate (79–88)
Severe (89–98)
STREX recommended
Annual summary
What each THI level does to your flock
| Level | State | THI | Impact on poultry |
|---|---|---|---|
| Emergency | Very Severe / Dead | ≥ 91 | Risk of mortality, severe panting, dehydration |
| Danger | Severe Stress | ≥ 80 |
Broilers
Feed intake ↓31%, BWG ↓53%, panting
Layers
Feed intake ↓21%, egg production ↓11%
|
| Warning | Moderate Stress | ≥ 73 | Broilers: Feed intake ↓29%, BWG ↓22% |
| Caution | Mild Stress | ≥ 63 | Normal activity — monitor as temperatures rise |
(Islam et al., 2023; Armstrong, 1994)
Data source: Islam et al. (2023), Annals of Bangladesh Agriculture — 27-year BMD meteorological data (1995–2022). Armstrong (1994) THI scale.