57 in Serbia[1] 24 in Bosnia and Herzegovina[2]2 in Croatia[3][4] 2 in Romania[5][6] 1 in Slovakia[7] Between 13 and 18 May 2014 a low-pressure cyclone[9] designated Tamara and Yvette affected a large area of Southeastern and Central Europe, causing floods and landslides.

Towns of Obrenovac in Serbia and Doboj in Bosnia and Herzegovina account for most victims, after being inundated by several-meter high waters from nearby rivers.

[13] The rains activated torrents and mudslides, and subsequently several rivers in watersheds of Sava and Morava rose and flooded surrounding valleys.

[17] The events initiated a large international aid campaign, with numerous countries, organizations and individuals donating humanitarian, material and monetary support for the affected areas.

[21] By 15 May, the monthly rainfall in Belgrade had broken the historical record (175 L from 1897), reaching 205 L.[22] By Saturday, May 17, the rain had subsided, and the weather gradually became warmer and sunnier, somewhat easing relief and rescue efforts.

[20] The main flooding region was the watershed of the Sava river, which forms a border between Bosnia and Croatia, flows into Serbia, and drains into the Danube in Belgrade.

The deadliest impact occurred on Thursday, 15 May, when water levels in several right-bank tributaries of the Sava suddenly and uncontrollably rose at an unprecedented rate, flooding towns in their valleys.

Subsequently, the Sava itself rose to record-high levels, threatening the cities of Slavonski Brod, Šabac and Sremska Mitrovica and numerous villages, but the damage was relatively contained as the population, helped by army and volunteers, strengthened flood defenses.

[24] Belgrade's Institute "Jaroslav Černi", funded by UNDP, compiled a study "Improvement of the water protection in the Kolubara drainage basin".

Hydrological section of the report concludes that the cyclone caused the "continual rain of temperate intensity", which however lasted for too long (over three days).

A discharge of the Sava, right after the mouth of the Bosna, at the Šamac bridge, was 6,000 m3/s (210,000 cu ft/s) on 17 May (Abdulaj R., et al., Velike vode donjeg toka rijeke Save tijekom svibnja 2014, Hrvatska vodoprivreda, 207, 14–16, 2014).

The riparian zone along the Sava in Belgrade, called Savski Nasip and enhanced with the embankments, is designed for receiving 6,500 m3/s (230,000 cu ft/s), so the city would probably suffer a major damage.

Eastern Croatia and southern Romania also experienced flooding and human victims, while Austria, Bulgaria, Hungary, Italy, Poland and Slovakia were affected by the storm.

[26] During the night between 15 and 16 May, nearby Kolubara river, collecting waters from southerly mountains, suddenly rose several meters above its banks and flooded the city, catching the residents by surprise.

[30] In Krupanj in western Serbia (located in a valley of several small rivers) torrents, mudslides and landslides devastated the infrastructure and destroyed dozens of houses.

[33] In the Drina river valley, on the border with Bosnia, heavy rain activated landslides, cutting off several villages and closing roads.

[27][34] Peak flood waters from Sava river hit Šabac on 18 May, but the embankments survived, strengthened by efforts of the army and several thousands volunteers.

Flood waters on the river reached 6.3 metres (21 ft), the highest on record, endangering Šabac and Sremska Mitrovica on the left bank.

[26] Further east, along the valleys of Morava and Mlava rivers, city centers of Paraćin, Petrovac na Mlavi, Svilajnac and Smederevska Palanka were flooded.

[37] Further east, the thermoelectric power plant TPP Kostolac, which supplies 11% of electricity in Serbia, was threatened by floods from the Mlava river, but the water had not breached the innermost ring of defenses.

Thousands of cows, sheep, chicken and other domestic animals perished in the floods, and their corpses present a serious health risk for people who started returning and repairing their homes.

"[citation needed] In a July 2014 report by the Government of Serbia, the total amount of damage in the country was estimated at 1.53 billion Euro.

[44] At a press conference on 19 May, the Director of Police of Republika Srpska gave the names of 17 confirmed victims: 10 in Doboj, 2 in Šamac, 2 in Modriča and one each in Bijeljina, Vlasenica and Donji Žabar; an additional 7 persons are still listed as missing.

[44] It was speculated that the floodwaters might have disturbed land mines left over from the Bosnian War (1992–95) which could cause further danger if moved outside the marked areas.

Several streets were flooded, trees were uprooted, and a thick layer of ice covered important transport arteries, paralyzing the traffic in the capital.