The mercury touched 42 degrees Celsius in the megapolis on Sunday, while the Pakistan Meteorological Department (PMD) said sea breezes were likely to be restored in the evening.
The Met department warned of a further increase in heat intensity on Monday. The department also said there was no chance of rain in Karachi. The latest update came after the city remained in the grip of hot weather on Saturday, when the maximum temperature was recorded at 38.5°C.
The PMD had on Saturday warned that temperatures could rise to 40°C on Sunday and climb further to 41°C on Monday, while heatwave conditions were expected to persist until May 3.
PMD Deputy Director Anjum Nazir Zaigham had urged the public to take precautionary measures to protect the elderly, children, valuables and animals, and advised residents to avoid unnecessary outdoor exposure, particularly during peak afternoon hours.
He had also said westerly winds were expected to influence the region after this phase, bringing slight relief and temporarily reducing the intensity of the heat.
However, he warned that the broader outlook for May and June remained severe, with intense heatwaves likely across parts of Sindh, southern Punjab and Balochistan as temperatures were expected to stay above normal.
Senior meteorologist Muhammad Aslam warned of rising temperatures across southern Punjab, Sindh, and Balochistan, advising the public to stay hydrated and avoid unnecessary outdoor exposure between 10 am and 4 pm, as a further 3 to 4 degree increase is expected after May 6.
While speaking to a local media outlet, the expert said that with rising temperatures, hospitals are witnessing an increase in patients suffering from heat-related illnesses.
He advised people to wear light-colored clothing, avoid going outdoors unnecessarily, and always cover their heads with a cap or cloth for protection from direct sunlight.
He further recommended drinking plenty of water and natural fluids like sugarcane juice to stay hydrated during the intense heat conditions.
The expert also stressed avoiding outdoor movement between 10 am and 4 pm, when temperatures are at their peak, especially for vulnerable groups.
He added that farmers should take extra care of their livestock during the heatwave, urging animal owners to ensure proper shade, water, and protection as temperatures are expected to rise further after May 6.
He also advised motorists to take extra precautions while travelling in extreme heat, keeping water with them, avoiding unnecessary trips during peak hours, and ensuring vehicles are properly maintained as temperatures are expected to rise.
He stressed the importance of following local administration instructions to ensure public safety and urged people to strictly follow the Met Department forecasts and advisories.