Canal (1775) were dug to irrigate the territories of Montfavet, Pontet, and Vedène. They were divided into numerous "fioles" or "filioles" (in Provençal filhòlas or fiolo). Similarly, to irrigate the gardens of the wealthy south of Avignon, the Puy Canal was dug (1808). All of these canals took their water from the Durance. These canals were initially used to flood the land, which was very stony, to fertilize them by deposition of silt. All of these canals have been used to operate many mills. Seismicity Under the new seismic zoning of France defined in Decree No. 2010-1255 of 22 October 2010 concerning the delimitation of the seismicity of the French territory and which entered into force on 1 May 2011, Avignon is located in an area of moderate seismicity. The previous zoning is shown below for reference. "The cantons of Bonnieux, Apt, Cadenet, Cavaillon, and Pertuis are classified in zone Ib (low risk). All other cantons the Vaucluse department, including Avignon, are classified Ia (very low risk). This zoning is for exceptional seismicity resulting in the destruction of buildings.". The presence of faults in the limestone substrate shows that significant tectonic shift has caused earthquakes in different geological ages. The last major earthquake of significant magnitude was on 11 June 1909. It left a visible trace in the centre of the city since the bell tower of the Augustinians, which is surmounted by an ancient campanile of wrought iron, located in Rue Carreterie, remained slightly leaning as a result of this earthquake. Climate Avignon has a hot-summer mediterranean climate (Köppen climate classification: Csa), though the dry-summer effect is not as strong as coastal locations like Marseille due to its more sheltered inland location. With mild-cool winters and hot summers, with moderate rainfall year-round. July and August are the hottest months with average daily maximum temperatures of around 28 °C, and January and February the coldest with average daily maximum temperatures of around 9 °C. The wettest month is September, with a rain average of 102 millimetres, and the driest month is July, when the monthly average rainfall is 37 millimetres. The city is often subject to windy weather; the strongest wind is the mistral. A medieval Latin proverb said of the city: Avenie ventosa, sine vento venenosa, cum vento fastidiosa (Windy Avignon, pest-ridden when there is no wind, wind-pestered when there is). According to Météo-France the number of days per