By Ellalyn de Vera-Ruiz The air temperatures are expected to soar in the next days as the warm and humid winds coming from the Pacific linger across the country. The Philippine Atmospheric, Geophysical and Astronomical Services Administration's (PAGASA) five monitoring stations recorded maximum air temperatures over 37 degrees Celsius on Saturday afternoon. Zamboanga City's maximum temperature was registered at 37.9 degrees Celsius; 37.8 degrees Celsius in Cotabato City; 37.8 degrees Celsius in San Jose, Occidental Mindoro; 37.2 degrees Celsius in Tuguegarao City; and 37.0 degrees Celsius in General Santos City. The high air temperatures were attributed to the prevalence of the warm and humid easterly winds. This Monday, PAGASA said the whole country will likely experience partly cloudy to cloudy skies in the morning with chances of rain showers or thunderstorms in the afternoon or evening. The weather bureau advised the public to drink plenty of water regularly and minimize strenuous physical activities, especially from noon until afternoon, to prevent heat stress. Based on the PAGASA's extended weather outlook from April 20 to April 23, air temperature will range between 25 and 35 degrees Celsius in Metro Manila, between 25 and 38 degrees Celsius in Tuguegarao City, and from 26 to 38 degrees Celsius in Zamboanga City. People may perceive or feel warmer than the air temperature reading due to high temperature in the atmosphere. This is called heat index, which is higher by at least 2 to 3 degrees Celsius from the actual air temperature. PAGASA does not see the formation of a low pressure area or tropical cyclone inside the country's area of responsibility within the next two to three days.