The risk is ridiculously small. I know that does not make you feel better, this may... Air Asia was over open water requesting to climb over weather as I assume a course correction would have lost time and fuel, this happens over land as well but you will be within closer proximity to more diversion airports than Air Asia had availability to. Also you will be flying in denser airspace, your flight crew will have more advance warning of weather and turbulence. If you are still scared, go to your doctor ask for a sedative and chase it with a drink!