A cloudburst is an extreme amount of precipitation in a short period of time, sometimes accompanied by hail and thunder, which is capable of creating flood conditions. Cloudbursts can quickly dump large amounts of water, e.g. 25 mm of the precipitation corresponds to 25,000 metric tons per square kilometre. However, cloudbursts are infrequent as they occur only via the orographic lift or occasionally when a warm air parcel mixes with cooler air, resulting in sudden condensation. At times, a large amount of runoff from higher elevations is mistakenly conflated with a cloudburst. The term "cloudburst" arose from the notion that clouds were akin to water balloons and could burst, resulting in rapid precipitation. Though this idea has since been disproven, the term remains in use.
The 2009 Messina floods and mudslides occurred in Sicily on the night of 1–2 October, mainly along the Ionian coast in the Province of Messina. They also affected other parts of northeastern Sicily and killed a total of at least 31 people, some of whom were swept out to sea. More than 400 people were left homeless, as many houses collapsed.
The 2010 Arkansas floods were flash floods that killed at least 20 people near Langley, Arkansas, United States, in the early morning of June 11, 2010. Heavy, localized rainfall from six to eight inches (150–200 mm) flooded the Little Missouri and Caddo rivers, sweeping through campsites in the Ouachita National Forest.
The 2010 China floods began in early May 2010. Three hundred and ninety-two people died, and a further 232 people were reported missing as of June 30, 2010, including 57 people in a landslide in Guizhou. Fifty-three of the deaths occurred from the flooding and landslides between May 31 and June 3, and 266 deaths occurred between June 13 and June 29. Four hundred and twenty four people were killed by the end of June, including 42 from the Guizhou landslide; 277 more were killed and 147 were missing in the first two weeks of July, bringing the death toll as of August 5 to 1,072. A landslide in early August in Gansu killed at least 1,471 people and left 294 missing. In total, the flooding and landslides killed at least 3,185 people in China by August 31. More than 230 million people in 28 provinces, municipalities, and regions, especially the southern and central provinces and regions of Zhejiang, Fujian, Jiangxi, Hubei, Hunan, Guangdong, Guangxi, Chongqing Municipality, Gansu, Sichuan, and Guizhou, and the northeastern province of Jilin were affected, while at least 4.66 million people were evacuated because of the risk of flooding and landslides in the latter half of June. By early August, over 12 million people were evacuated, and that number rose to 15.2 million by August 31.
Typhoon Sarah, known in the Philippines as Typhoon Openg, was a powerful typhoon that caused extensive damage along an erratic path across the Western Pacific in September 1989. Originating from a disturbance within a monsoon trough in early September, Sarah was first classified as a tropical depression near the Mariana Islands on September 5. Moving quickly westward, the depression soon strengthened into Tropical Storm Sarah. On September 8, the storm abruptly turned southward and temporarily attained typhoon status. Following a series of interactions with secondary areas of low pressure, the storm turned northward the following day. By September 11, Sarah entered a region favoring development and underwent a period of explosive intensification. At the end of this phase, the storm attained its peak intensity as a Category 4–equivalent typhoon on the Saffir–Simpson Hurricane Scale. The typhoon subsequently weakened rapidly and made two landfalls in Taiwan by September 12. After moving over the Taiwan Strait, Sarah made its final landfall in Eastern China on September 13 before dissipating the following day.
In June 2013, a mid-day cloudburst centered on the North Indian state of Uttarakhand caused devastating floods and landslides, becoming the country's worst natural disaster since the 2004 tsunami. The rainfall received that month was far greater than the rainfall the state usually received. Debris blocked the rivers, causing major overflow. The main day of the flood was 16 June 2013.
A major earthquake occurred in Nepal on 12 May 2015 at 12:50 pm local time with a moment magnitude of 7.3, 18 kilometres (11 mi) southeast of Kodari. The epicenter was on the border of Dolakha and Sindhupalchowk, two districts of Nepal. This earthquake occurred on the same fault as the larger magnitude 7.8 earthquake of 25 April, but further east than the original quake. As such, it is considered to be an aftershock of the April quake. It struck at a depth of 18.5 km (11.5 mi). Shaking was felt in northern parts of India including Bihar, Uttar Pradesh and West Bengal. Tremors were felt as far as about 2,400 km away from the epicenter in Chennai.
Beginning on 14 May 2016, a low pressure area over the Bay of Bengal caused torrential rain to fall across Sri Lanka, causing floods and landslides which affected half a million people. As of 25 May 2016 the death toll was 101 with 100 missing.
The 2017 Sri Lanka floods resulted from a heavy southwest monsoon, beginning around 18 to 19 May 2017. Flooding was worsened by the arrival of the precursor system to Cyclone Mora, causing flooding and landslides throughout Sri Lanka during the final week of May 2017. The floods affected 15 districts, killed at least 208 people and left a further 78 people missing. As of 3 June, 698,289 people were affected, while 11,056 houses were partially damaged and another 2,093 houses completely destroyed. According to Al Jazeera, about 600,000 people have been displaced due to the floods.
In late June through mid-July 2018, successive heavy downpours in southwestern Japan resulted in widespread, devastating floods and mudflows. The event is officially referred to as Heisei san-jū-nen shichi-gatsu gōu by the Japan Meteorological Agency. As of 20 July, 225 people were confirmed dead across 15 prefectures with a further 13 people reported missing. More than 8 million people were advised or urged to evacuate across 23 prefectures. It is the deadliest freshwater flood-related disaster in the country since the 1982 Nagasaki flood when 299 people died.
In mid-March 2019, monsoonal downpours caused widespread flooding and landslides across South Asia.
The 1992 India–Pakistan floods was a deadly flood caused by a five days long heavy monsoon rains and severe weather that occurred on 7 September 1992 across the north-Pakistan of Azad Kashmir, North-West Frontier Province and Indian administered state of Jammu and Kashmir. Severe floods left at least 2,496 fatalities, including 2,000 deaths in Pakistan administered state, 296 in Punjab province, and 200 in northern India with several others missing. The floods swept away more than 12,672 villages and several people were buried alive due to landslides near mountains. Punjab, that shares its borders with Azad Kashmir, suffered a heavy agriculture loss in its economic history.
The 2020 East Africa floods were a natural disaster in Rwanda, Kenya, Somalia, Burundi, Ethiopia, Uganda, Democratic Republic of Congo, Djibouti and Tanzania, affecting at least 700,000 people. They began when excessive rains began falling in March, leading to massive flooding and landslides. They caused more than 430 deaths, notably in Kenya and Rwanda. In the fall another round of floods hit the African Sahel.
The 2020 Kyushu floods were a series of floods in July 2020 brought on when record-breaking heavy rain hit the prefectures of Kumamoto and Kagoshima, on the southern Japanese island of Kyushu, on 4 July 2020 in the middle of the East Asian rainy season. The event is officially referred to as Reiwa ni-nen shichi-gatsu gōu by the Japan Meteorological Agency. As a result of flooding and landslides, 77 people were confirmed dead and approximately seven are missing. Fourteen of the victims were residents of an old age home in Kuma, Kumamoto that was flooded. Approximately 15,335 buildings were destroyed, damaged or flooded.
The 2021 floods and landslides in Sri Lanka are flash floods and mudslides which were caused from heavy torrential rainfalls during May and June 2021. As of 7 June 2021; the monsoon floods affected in about 10 districts, killing at least 17 persons including about 10 because of floods and 4 people because of mudslides. About 245,000 people were affected living in Colombo, Puttalam, Kandy, Kalutara, Kurunegala, Gampaha, Nuwara Eliya, Ratnapura and Galle. More than 800 houses were reported to have been damaged.
In 2016 Pakistan experienced higher rainfall than normal (10-20%), especially in the pre-monsoon season. Heavy monsoon rains are common in the region. This led to multiple periods of flooding, landslides, and damage particularly in Northern Pakistan. The Swat River overflowed and multiple landslides occurred around Pakistan including in Khyber Pakhtunkhwa, Gilgit-Baltistan, Azad Jammu, and Kashmir.
From January to October 2022, excessive rainfall and widespread monsoon flooding occurred in the South Asian countries of Afghanistan, Bangladesh, India, Nepal, Pakistan, and Sri Lanka. It has become the region's deadliest floods since 2020, with over 3,700 people dead.
After over 6,500 people died in flooding in 2020, monsoon floods hit South Asia again in 2021.
On 2–3 June 2023, heavy rains caused destructive flooding across Haiti. Western areas of the country were particularly hard-hit. At least 51 people were killed, 140 were injured, and 11 were reported missing as of 6 June.
