The Greek Traffic Police has advised citizens against traveling to the closed Parnassus ski resort and the high-traffic area of Kalavryta due to ongoing severe weather conditions from storm Elena. Citizens are reminded to use snow chains and exercise caution while driving. Additionally, various areas in Attica have faced traffic interruptions and flooding. The Civil Protection Agency urges individuals to secure loose items and avoid unnecessary travel during intense rain or snow, with weather conditions expected to persist through the end of the week.