The ice season ends in mid-April. Owing to increasing temperatures ice starts to melt and becomes shallow and fragile, especially in places with strong under-ice flows. A range of factors contribute to an increased risk of falling through the ice towards the end of the season, resulting in multiple deaths in Russia each year, although exact data for Baikal are unknown. Viktor Viktorovych Yanukovych, son of former Ukrainian President Viktor Yanukovych, reportedly died after his car fell through the ice while driving on Baikal in 2015.