Trier officially celebrated its 2,000th anniversary in 1984. On December 1, 2020, 5 people were killed by an allegedly drunk driver during a vehicle-ramming attack. The Ehrang/Quint district of Trier was heavily damaged and flooded during the July 16, 2021 floods of Germany, Belgium, The Netherlands and Luxembourg. Trier sits in a hollow midway along the Moselle valley, with the most significant portion of the city on the east bank of the river. Wooded and vineyard-covered slopes stretch up to the Hunsrück plateau in the south and the Eifel in the north. The border with the Grand Duchy of Luxembourg is some away. Neighbouring municipalities Listed in clockwise order, beginning with the northernmost; all municipalities belong to the Trier-Saarburg district Schweich, Kenn and Longuich (all part of the Verbandsgemeinde Schweich an der Römischen Weinstraße), Mertesdorf, Kasel, Waldrach, Morscheid, Korlingen and Gusterath (all in the Verbandsgemeinde Ruwer), Hockweiler, Franzenheim (both part of the Verbandsgemeinde Trier-Land), Konz and Wasserliesch (both part of the Verbandsgemeinde Konz), Igel, Trierweiler, Aach, Newel, Kordel, Zemmer (all in the Verbandsgemeinde Trier-Land). Organization of city districts The Trier urban area is divided into 19 city districts. For each district there is an Ortsbeirat (local council) of between 9 and 15 members, as well as an Ortsvorsteher (local representative). The local councils are charged with hearing the important issues that affect the district, although the final decision on any issue rests with the city council. The local councils nevertheless have the freedom to undertake limited measures within the bounds of their districts and their budgets. The districts of Trier with area and inhabitants (December 31, 2009): Climate Trier has an oceanic climate (Köppen: Cfb), but with greater extremes than the marine versions of northern Germany. Summers are warm except in unusual heat waves and winters are recurrently cold, but not harsh. Precipitation is high despite not being on the coast. As a result of the European heat wave in 2003, the highest temperature recorded was 39 °C on 8 August of that year. The lowest recorded temperature was −19.3 °C on February 2, 1956. Main sights Trier is known for its well-preserved Roman and medieval buildings, which include: the Porta Nigra, the best-preserved Roman city gate north of the Alps; the huge Aula Palatina, a basilica in the original Roman sense, was the long throne hall of Roman emperor Constantine; it is today used as a Protestant church; adjacent