Warehouse Heat Stress During El Nio: Why Malaysian Warehouses Should Use WBGT Monitoring Malaysia Warehouses are often assumed to be safer from extreme heat because employees work indoors. However, many warehouses in Malaysia are large buildings with metal roofing, limited air-conditioning, variable ventilation and frequent loading-bay activity. During prolonged periods of hot weather associated with El Nio conditions, indoor warehouse temperatures and worker heat exposure can become an important occupational safety concern. For warehouse operators, logistics companies, Safety & Health Officers and EHS teams, a WBGT Heat Stress Meter can provide useful environmental measurements for assessing workplace heat conditions. Why Can Malaysian Warehouses Become Extremely Hot? A warehouse can accumulate heat from several sources. These may include: Solar heat absorbed by the roof High outdoor temperature High humidity Limited ventilation Poor air circulation Heat-producing machinery Forklift activity Loading bays exposed to sunlight Workers performing physical activities Large enclosed storage areas Some warehouses are also designed primarily for storage efficiency rather than thermal comfort. As a result, conditions inside different parts of the same warehouse may vary considerably. A Warehouse Can Be Hotter Than the Office Consider a typical logistics facility. Office Air-conditioned Low physical workload Controlled environment Main Warehouse Large enclosed area Metal roofing Limited cooling Workers moving goods Loading Bay Partially outdoors Direct or reflected sunlight Frequent physical activity All three locations belong to the same facility, but employees can experience very different heat conditions. Measuring only the office temperature therefore tells management very little about heat exposure on the warehouse floor. What Is WBGT? WBGT stands for: Wet Bulb Globe Temperature It is an environmental heat-stress index used for assessing thermal conditions affecting workers. Depending on the instrument and measurement method, relevant factors can include: Air temperature Humidity Natural wet-bulb temperature Globe temperature Radiant thermal conditions This makes WBGT different from simply measuring ambient temperature. Why Isn't a Normal Temperature Meter Enough? Suppose two warehouse zones both have an air temperature of 33°C. One has good airflow. The other has poor ventilation, higher humidity and additional radiant heat from the roof. Although an ordinary thermometer may display a similar temperature, the thermal environment experienced by workers may be different. This is why organizations evaluating occupational heat exposure may require more than a standard thermometer. Which Warehouse Workers May Face Greater Heat Exposure? Heat monitoring can be particularly relevant for employees involved in: Picking and packing Loading and unloading Manual material handling Forklift operations Container loading Container unloading Inventory movement Warehouse maintenance Outdoor yard operations Courier and distribution activities Physical workload is important because employees performing strenuous activities generate additional body heat. Environmental measurements should therefore be considered together with workload, clothing and other relevant workplace factors. Loading and Unloading Containers Container operations deserve particular attention. A shipping container exposed to the Malaysian sun can become extremely hot. Workers entering containers to load or unload goods may experience: High temperature + limited airflow + physical activity + enclosed working conditions The environment inside the container can also be very different from conditions elsewhere in the warehouse. For this reason, measurements should be performed at representative working locations rather than assuming one reading represents the entire facility. Metal Roofing and Radiant Heat Many industrial warehouses in Malaysia use metal roofing. During strong sunlight, roofing materials can absorb substantial solar energy. This heat can contribute to the thermal environment below the roof even if employees are not standing directly under the sun. WBGT instruments incorporate globe-temperature measurement to help account for radiant thermal conditions. This is one reason they can be valuable for warehouse heat-stress assessments. When Should a Warehouse Measure WBGT? Heat conditions can change significantly throughout the day. A warehouse may feel relatively comfortable at: 8:00 AM but become substantially hotter by: 1:00 PM4:00 PM Monitoring may therefore be useful during: Afternoon periods Hot-weather events Extended dry periods Peak warehouse operations Container unloading High-workload activities Areas with limited ventilation Loading-bay operations Measurements should reflect the locations and times where employees actually work. El Nio 20262027 and Warehouse Operations If Malaysia experiences prolonged hotter and drier conditions during the developing El Nio period, warehouse operators may face increased challenges in maintaining comfortable working environments. This is especially relevant to facilities without full air-conditioning. Rather than waiting for unusually hot conditions, companies can begin establishing baseline measurements beforehand. A simple approach is: Normal Conditions → Baseline WBGT Measurements → Identify Hot Zones → Monitor During Hot Weather → Review Controls This provides management with actual measurements instead of relying only on employees' perception of temperature. What Can Companies Do After Identifying Hot Areas? A WBGT meter provides measurement data. Actions should then follow the company's applicable safety procedures, risk assessment and professional guidance. Dpending on the working environment, possible controls may involve reviewing: Ventilation Air movement Work scheduling Rest arrangements Hydration availability Shaded or cooler rest areas Workload PPE Worker acclimatization Heat awareness Monitoring frequency WBGT readings should therefore form part of a broader heat-risk management process. WBGT Meter vs Temperature & Humidity Data Logger Warehouses may use both instruments, but for different purposes. Temperature & Humidity Data Logger Useful for continuous monitoring of environmental conditions and stored goods. Common applications include: Food storage Pharmaceuticals Electronics General warehousing Environmental records WBGT Heat Stress Meter Designed primarily for assessing human heat exposure. Common applications include: Warehouse employees Loading-bay workers Container operations Manual handling teams Occupational safety assessments A warehouse may therefore require both types of instruments depending on its objectives. Tenmars WBGT Heat Stress Meter Options Tenmars provides professional environmental measurement instruments for heat-stress applications. Tenmars TM-288 A portable WBGT Heat Stress Meter suitable for workplace and environmental monitoring. Tenmars TM-188B A WBGT Heat Stress Meter featuring BLE wireless capability, useful for applications where wireless monitoring and data handling are required. Tenmars TM-188D A professional WBGT Heat Stress Meter option for occupational and environmental heat monitoring. Customers should select a model according to their measurement, logging, alarm and connectivity requirements. Who Should Use WBGT Meters in Warehouses? Potential users include: Safety & Health Officers EHS / HSE Departments Warehouse Managers Logistics Managers Facility Managers Occupational Safety Consultants Industrial Hygienists Distribution Centre Operators Industries That May Benefit Warehouse heat monitoring can be relevant to: Logistics E-commerce fulfilment Manufacturing Automotive parts Electronics Food distribution Building materials Industrial supplies Retail distribution Courier operations Third-party logistics (3PL) Import and export warehouses Prepare Before the Hottest Period Heat monitoring is most useful when companies establish a procedure before conditions become extreme. Baseline measurements allow safety teams to understand normal warehouse conditions. When hotter weather arrives, they can compare new measurements with previous observations and identify areas requiring closer attention. For Malaysian warehouse and logistics operations, WBGT monitoring can become an increasingly useful part of workplace heat-risk management during prolonged hot-weather periods. Tenmars WBGT Meter Supplier for Warehouses in Malaysia MTM Precision supplies professional Tenmars Heat Stress WBGT Meters and environmental monitoring instruments in Malaysia. We can support applications involving: Warehouse Logistics Distribution Centre Factory Loading Bay Container Operations EHS HSE Occupational Safety Tell us your working environment and monitoring requirements, and our team can assist with product selection. MTM Precision Sdn Bhd Website: www.mtmpre.com.my WhatsApp: +6016-660 7346 Email: mtmpre@yahoo.com Showroom & Service Centre No. 29-1 & 29-2, Jalan Bandar 18, Pusat Bandar Puchong, 47160 Puchong, Selangor, Malaysia. Looking for a WBGT Heat Stress Meter for a warehouse or logistics facility in Malaysia? Contact MTM Precision for Tenmars WBGT Meter selection and quotation.