Weather event in Asia
Starting in April 2023, a record-breaking heat wave has affected many Asian countries, including India, Sri Lanka, Bangladesh, Cambodia, China, Laos, Thailand, Malaysia, Singapore and Vietnam. Several regional temperature records have been set. The heat wave has caused many deaths due to heat stroke and has prompted health warnings and power outages across multiple countries.
A May study by the World Weather Attribution found that the heat wave was made at least 30 times more likely by climate change in India and Bangladesh, and that climate change raised temperatures by at least 2°C (3.6°F) in many parts of Asia in April.
West Asia.
Iran had announced a nationwide shutdown due to heat but it has been said it was secretly because of electricity power shortage.
South Asia.
Bangladesh.
In Dhaka, temperatures rose above on 15 April, which resulted in road surfaces melting. Power cuts took place in parts of Bangladesh due to a surge in electricity demand caused by the heat wave. Cases of heat exhaustion and heat stroke have increased in the country due to the heat.
M. A. Rahim, a professor at Daffodil University in Dhaka, said that the heat wave was impacting the country's rice and fruit production, estimating that rice production could fall by up to 40%.
In early June, the maximum temperature rose to about . The heat wave caused primary schools to be closed, and frequent power cuts, with a fuel shortage resulting in the shutdown of several power plants. It has also affected the country's tea production.
India.
Six cities in India's north and eastern regions recorded temperatures above , while New Delhi recorded on 18 April.
The Ministry of Labour issued an advisory to all states and regions to provide workers with adequate drinking water, emergency ice packs and frequent breaks. Mamata Banerjee, the Chief Minister of West Bengal, closed all schools in the state between 17 and 22 April due to concerns about the heat. In the same week, schools were closed in Tripura and Odisha.
K. J. Ramesh, director general of meteorology at the Meteorological Department, said in May that some states had started implementing mitigation efforts, such as closing schools by 1p.m., operating government offices at 7a.m.–1p.m. and advising youths and seniors to stay indoors at 11a.m.–3p.m.
Later in May, the Indian Meteorological Department issued a heat wave alert for seven southern and central states. Temperatures surpassed in Uttar Pradesh, with some parts being hit by 12-hour blackouts. The blackouts sparked protests at power stations near Lucknow. On May 23 and 25, three cheetah cubs died in Kuno National Park and one was sent to be treated in a critical care facility. The cubs were the first to be born in India in over seven decades. The heat wave in India was believed to have weakened the cubs.
As of 19 June, 119 people in Uttar Pradesh and 47 people in Bihar had died due to heat-related illnesses. Around 400 people were hospitalised in Uttar Pradesh in the same time period.
Maharashtra deaths.
On 16 April, 13 people died from heat stroke after attending the Maharashtra Bhushan award event in Kharghar, Navi Mumbai, and 50–60 people were hospitalised.
The incident happened at a government event where Union Home Minister Amit Shah presented social worker Appasaheb Dharmadhikari with the Maharashtra Bhushan award. The episode was brought on by extended physical effort and exposure to high temperatures. Despite the fact that the IMD had not issued any heat wave warnings on that particular day, doctors have linked the deaths to prolonged exposure to heat in open spaces and strenuous activity. Many people came from nearby districts as well, which would have made their situation worse. Outrage over the occurrence has led to political figures calling for the government to be held accountable for the fatalities.
Nana Patole, President of the Maharashtra Pradesh Congress Committee, has sought the resignations of the Chief Minister and Deputy Chief Minister and called for the administration to be held accountable. Uddhav Thackeray, the former chief minister of Maharashtra, and Ajit Pawar, the head of the NCP, went to the hospital to inspect the situation and criticise the organisation of the event. Concerns regarding the need for improved planning and procedures to stop similar catastrophes in the future have been raised in response to the tragedy.
Nepal.
In June, temperatures in Nepal topped for days, with cities such as Nepalgunj and Nawalpur reaching as high as . The heat forced the closures of some schools and colleges in the country for over a week. The country's meteorological department warned that the high temperatures would likely persist until mid-July.
Pakistan.
Nine cities recorded temperatures greater than or equal to on 23 April. On 21 May, Jacobabad reached .
Sri Lanka.
On 17 April, Sri Lanka's Department of Meteorology warned that the temperature was expected to increase to "caution level" in the Eastern, North Central and North Western provinces and the Hambantota, Kilinochchi, Mannar, Monaragala, Mullaitivu and Vavuniya districts. As of 27 April, the temperature in the country was .
Southeast Asia.
Tieh-Yong Koh, an associate professor at the Singapore University of Social Sciences, said in May that the prolonged dryness across Cambodia, Laos, Myanmar, Thailand and Vietnam is due to suppressed rainfall during the previous winter. He noted, "Because dry soil heats up faster than moist soil, a hot anomaly naturally forms as spring arrives".
Cambodia.
Cambodia has been affected by water shortages due to high water demand in Thailand. Cambodia's Ministry of Water Resources and Meteorology predicted that hot weather would continue until mid-May, with less rainfall than in 2022. It also said that weather patterns were being affected by El Niño, and the resulting heat would last until August.
In May, temperatures of were recorded in Kratié and the Ponhea Kraek district, setting a new national May record.
Laos.
In April, the Sainyabuli province reached on 19 April in a new all-time record for the country.
On 6 May, Luang Prabang reached , surpassing the country's previous record, and Thakhek recorded that night, making it the country's hottest night. Over the same weekend, Vientiane reached , breaking the city's all-time record.
Malaysia.
In April, Malaysia's Meteorological Department issued heat wave alerts in several states. The highest temperature recorded was in Negeri Sembilan. On 25 April, an 11-year-old boy and a 19-month-old toddler died of heat stroke and severe dehydration in Kelantan. At least five people required medical treatment due to the heat.
On 3 May, the Education Ministry announced that all outdoor activities in schools would be suspended due to the heat. Two days later, the national meteorological department said the country's heat wave was expected to last until June. Students have been permitted to wear casual clothing instead of school uniforms. On 16 May, Deputy Prime Minister Ahmad Zahid Hamidi said that there were no immediate plans to declare the heat wave an emergency, but the government would do so if necessary.
Myanmar.
On 25 April, four weather stations in Myanmar recorded monthly high temperatures, with Theinzayet in the Mon State recording the highest temperature at . The next day, the city of Bago reached , matching a record previously reached in May 2020 and April 2019, according to weather historian Maximiliano Herrera.
On 7 May, the temperature rose to in the Magway Region. Media reports said that there were 61 deaths due to heat-related problems, but Radio Free Asia was unable to verify the number.
Philippines.
In the Philippines, temperatures reached up to , while the heat index rose to in Butuan on 21 April– the highest in the country so far for 2023. A power cut at a secondary school resulted in nearly 150 students being affected by heat stroke; two students were rushed to a hospital. The Department of Education announced that from 24 April, schools would be able to move classes online at their discretion to avoid the heat. 839 schools switched to distance learning to prevent students from falling ill due to the extreme heat.
On 12 May, the heat index reached in Legazpi, Albay. In the same month, schools in Quezon City were allowed to shorten their hours due to the extreme heat.
Singapore.
Singapore reached in Admiralty on 14 April, the highest temperature recorded in the country since the start of 2023. This was broken just under a month later, with the temperature reaching in Choa Chu Kang on 12 May. On the following day, the temperature in Ang Mo Kio hit , tying the record set on 17 April 1983 at Tengah. Singapore also recorded its highest ever daily minimum temperature for the month of May – in East Coast Park on 25 May. In general, May 2023 was the warmest May on record for Singapore, with the Changi climate station observing an average temperature of .
Several schools have begun relaxing their rules on school uniforms to help students deal with the heat. Singapore's Meteorological Service said earlier in May that the country was "not currently experiencing a heatwave" despite recently recording relatively high temperatures.
Thailand.
In Thailand, the temperature rose to over for the first time in its history according to Herrera, with the city of Tak reaching on 15 April. Large portions of the country have had temperatures in the range of upper 30s to lower 40s degrees Celsius since March. According to ArabiaWeather, Thailand's previous all-time record was in the Mae Hong Son province. Two deaths due to the heat wave were reported.
Thousands were forced to flee from Chiang Mai due to pollution caused by the annual burning in northern Thailand and Myanmar. Power outages have become common due to the high use of air conditioners and refrigeration. On 25 April, rain in Bangkok brought respite from the heat. 
The Thai government has issued health warnings, with the health department warning about the risk of heat stroke. On 22 April, the government issued a warning for people to stay indoors. On 21 April, Thailand's national weather service said that the heat index hit a record of .
On 6 May, Bangkok reached , the highest recorded in the city. On the next day, there were reports of people fainting due to the extreme heat, including advance voters in the 2023 general election. This included 14 people at Ramkhamhaeng University and 3 at Chan Kasem Rajabhat University. In the same week, temperatures in the northern and central regions remained above , resulting in an increase in power demand.
A May study by the World Weather Attribution found that Thailand's record heat wave was exacerbated by high humidity and a large number of forest fires that occurred around the same time.
Vietnam.
The Hòa Bình province recorded the highest temperature in 27 years for March in Kim Bôi district at .
On 6 May, the temperature in Hội Xuân, about 150 km south of Hanoi, reached , surpassing the country's previous record of in 2019. Later, the temperature reached in the Tương Dương district.
On 19 May, nationwide blackouts started rolling out across the country, with notices by Vietnam Electricity (EVN) saying the blackouts could continue until the end of the month and could last up to 7 hours in some areas. EVN warned that high temperatures could put pressure on the national power system due to a spike in electricity consumption and lower-than-normal water levels in some dams.
On 30 May, authorities in Hanoi started reducing the duration of public lighting to keep the power system running. On 1 June, Muong La reached , breaking the record for Vietnam's hottest June day.
East Asia.
China.
The best known incident occurred on July 16 in Sanbu Township, Xinjiang, which set a new record of . Two days later, on July 18, John Kerry, the U.S. Special Presidential Envoy for Climate visited Beijing and mentioned the Sanbu weather to Li Qiang, the Premier of China.
On 18 April, temperatures rose as high as in Yuanyang County, Yunnan. According to climatologist Jim Yang, over 100 weather stations broke their temperature record on 17 April. In multiple provinces, temperatures have exceeded . On 22–23 April, a cold front sweeping south and east triggered a significant drop in temperatures, torrential rain and heavy snowfall in parts of northern China, with Shanxi reporting up to 24 cm of snow.
On 6 May, the Changjiang Li Autonomous County in Hainan province reached , making it the highest temperature recorded in the province. In mid-May, Shandong province and Beijing issued heat warnings, with cities such as Jinan, Tianjin and Zhengzhou expecting temperatures to rise as high as . On 29 May, Shanghai recorded , the