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Flooding in Brazil: Over 100 People Dead, at Least 136 Missing as Rains Trigger Massive.

Severe flooding leaves at least 100 dead and thousands homeless in Flooding in Brazil.

Heavy rains have caused catastrophic flooding in southern Brazil killing at least 100 people and leaving thousands more homeless.

The southern state of Rio Grande do Sul was hit by heavy rain last week and subsequent flooding has washed away roads, collapsed bridges, and caused landslides across the state.

The latest estimates from the state civil defense authority say that 372 people have been injured and as many as 128 are still unaccounted for. More than 1.45 million people across 417 of the state’s 497 cities have been affected and the latest estimates suggest more than 200,000 people have been displaced.

Rio Grande do Sul has been virtually cut off from the rest of Brazil with roads flooded. The state’s main airport has been inundated by water and could be out of use for at least 30 days.

Officials have said it is the “worst natural calamity” to hit the state.

Residents rest in a makeshift shelter for people whose homes were flooded by heavy rains, in Canoas, Rio Grande do Sul state, Brazil.

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In Porto Alegre, the capital city of Rio Grande do Sul, several water plants have stopped functioning leaving an estimated 80 percent of the population without access to drinking water. Supplies are being rationed and officials are distributing drinking water to hospitals and shelters in tankers.

Many have also been left without electricity after power companies cut off supplies due to security reasons.

Thousands displaced by flooding across Rio Grande do Sul

With thousands of people displaced, homes and businesses destroyed, and widespread destruction, Brazilian President Luiz Inacio Lula da Silva promised the government would do “everything in [its] power” to contribute to the recovery of Rio Grande do Sul.

But rescue efforts have been hampered by looting and the flood waters that still linger in the city. In Porto Alegre, police have been providing volunteers with security patrols using boats and even jet skis.

Thousands are still waiting to be evacuated and officials have called for anyone who owns “any kind of boat” to offer it to emergency teams. Around 15,000 soldiers, firefighters, police, and volunteers are working to rescue people and transport aid.

Volunteers help to evacuate residents from an area flooded by heavy rains, in Porto Alegre, Brazil.

Brazilian Paralympic fencer Vanderson Chaves is one of those impacted by the disaster. He told the Associated Press that he has faced many challenges in his career but none as fearsome as these floods.

“There’s no way this wouldn’t affect me. To compete and to train well, you need to be well psychologically. And I’m not,” he said. The waters washed away his equipment, dozens of medals, and his passport and may even have thwarted his chances of reaching the Paris Games in September. He has also been displaced by the flooding.

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“I come from an impoverished area of Porto Alegre. Everything for me is more difficult to achieve. I am Black, I am disabled. And now this.”

Residents are also reportedly facing shortages of essential supplies including drinking water. In many places, access to supply trucks or employees is completely cut off.

Authorities warn more rain is on the way

Downpours started on 29 April with more than 300 millimetres of rain falling in less than a week, according to Brazil’s National Institute of Meteorology (INMET). Flooding started in the north of the state and then subsequently inundated more southerly cities including Porto Alegre.

It is the fourth environmental disaster the Rio Grande do Sul has seen in a year after flooding hit in July, September, and November of 2023.

Still reeling from massive flooding, the state now faces the possibility of further storms. Brazil’s national center for natural disasters has warned the region is at “high risk” of more flooding. Weather forecaster MetSul said Rio Grande do Sul could face “very large” floods of “serious proportions”.

The city of Canoas is flooded after heavy rain in Rio Grande do Sul state.

On Wednesday, Porto Alegre officials warned civilian rescuers to halt their operations because of forecasts for rain, lightning, and strong winds. INMET has also forecast a cold front this weekend with additional rains which will be particularly intense in the north and east of the state.

Army General Marcelo Zucco, one of the coordinators of rescue operations, told AP that his team was working at full speed before heavy rains that are forecast to hit the Porto Alegre area this weekend. Some improvement in conditions had helped his tea finally access some areas by land on Wednesday but more rain started to fall on the city that afternoon.

Dubai floods: Everything you should know about cloud seeding that could have resulted in flooding in the UAE

Dubai floods: The state-run WAM news agency described the rain as “a historic weather event” that was greater than “anything documented since the start of data collection in 1949.”

Tuesday’s “heaviest rain ever” fell on the parched United Arab Emirates (UAE), causing flooding in Dubai.

The state-run news service WAM described the rain as “a historic weather event,” better than “anything documented since the start of data collection in 1949.”

Tuesday saw rain in Oman, Qatar, Saudi Arabia, Bahrain, and Oman.

Among other things, “cloud seeding” is thought to be the cause of the widespread rain that was observed throughout the United Arab Emirates.

According to meteorologists at NCM cited in multiple media accounts, Emirates’ National Center for Meteorology (NCM) carried out six or seven cloud-seeding aircraft before to the rains that wreaked havoc in Dubai.

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What is cloud seeding?

Cloud seeding is a type of weather modification where substances like silver iodide or dry ice are dispersed into clouds to encourage precipitation, such as rain or snow. 

In countries like the UAE, where temperatures are high and annual rainfall is minimal, cloud seeding is employed to alleviate pressure on limited groundwater sources by enhancing precipitation.

How does cloud seeding work?

Cloud seeding is a technique where “seeding agents” such as silver iodide or salt are introduced into clouds to stimulate condensation and trigger rainfall.

Weather forecasters monitor atmospheric conditions and identify suitable clouds for seeding based on precipitation patterns. This technique can increase rainfall by up to 30-35 percent in clear conditions and 10-15 percent in more humid conditions.

What is UAE’s cloud seeding program?

The UAE initiated its cloud seeding program in the late 1990s, making it one of the first Middle Eastern countries to use this technique. Collaborative research with institutions like the National Center for Atmospheric Research (NCAR) and NASA has bolstered their efforts.

The UAE established the “UAE Research Program for Rain Enhancement Science” (UAEREP) in 2015 to address water security challenges.

According to the UAEREP, the Emirates’ National Centre of Meteorology (NCM) has established a national network of 86 automatic weather stations (AWOS) for weather monitoring, six weather radars covering the entire UAE, and one upper air station.

It has also created climate databases and assisted in the development of high precision Numerical Weather Predictions and simulation software in the UAE.

The UAEREP website further informed that currently, the NCM operates four Beechcraft King Air C90 aircraft from Al Ain Airport equipped with the latest technologies and devices employed for cloud seeding and atmospheric research.

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What is the environmental impact of cloud seeding?

Cloud seeding alters the precipitation patterns of a region/locality. This may negatively impact neighbouring ecosystems, who were to receive rain for the seeded clouds originally.

Introducing seeding agents might impact the natural hydrological cycle as it may change the natural soil moisture levels, groundwater recharge, and river flows.

Some experts worry about the potential for silver toxicity if cloud seeding becomes widespread. Silver iodide is a common seeding agent. Silver toxicity could pose risks to aquatic life and soil health.

Therefore, even with the promise cloud seeding holds, responsible stewardship and thorough evaluation of its environmental impacts are crucial. 

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The UAE’s water resources are severely strained due to its strong reliance on groundwater supplies and summer temperatures that can reach as high as 50 degrees Celsius.

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Less than 200 millimeters of rain fall on average per year in the United Arab Emirates (UAE). The UAE’s water resources are severely strained due to its strong reliance on groundwater supplies and summer temperatures that can reach as high as 50 degrees Celsius.

The United Arab Emirates (UAE) has been at the forefront of developing novel approaches to address this urgent problem. One such approach is cloud seeding, a type of weather modification that increases precipitation by creating artificial rain.

Understanding Cloud Seeding
The process of “seeding agents” into clouds in order to encourage condensation and precipitation is known as cloud seeding. Weather forecasters at the NCM start the procedure by keeping an eye on atmospheric conditions and using precipitation patterns to identify clouds that would be good candidates for seeding.

Cloud seeding was first tested in the UAE in 1982. Collaborative scientific and technical research with the National Center for Atmospheric Research (NCAR) in Colorado, USA, Witwatersrand University in South Africa, and NASA had strengthened the Gulf nation’s artificial rain program by the early 2000s.

The National Centre of Meteorology (NCM) of the United Arab Emirates (UAE) is in charge of the Rain Enhancement Program (UAEREP).

The program’s experts examined the physical and chemical properties of the UAE’s atmosphere, specifically aerosols and pollutants, and how they affected the development of clouds. Finding a potent chemical to promote cloud formation and eventually increase rainfall was the goal.

Following the identification of favorable clouds, specialized aircraft fitted with hygroscopic flares take to the air.

Environmental concerns
Cloud seeding has been shown to have potential advantages, although questions have been raised concerning its effects on the environment and the safety of the seeding substances utilized. As a result, the NCM has taken steps to guarantee the longevity and safety of its activities.

The UAE’s cloud seeding program doesn’t use any hazardous chemicals, in contrast to several other nations’ that make use of silver iodide, a substance that resembles crystals and has sparked environmental worries. Rather, it uses organic salts as seeding agents.

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The NCM created its own seeding agent, called nano material, which is made of fine salt that has been titanium oxide-coated. Trials and experiments are being conducted on this substance to determine how well it enhances precipitation.

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