For flooding and heavy rain I think it would be more realistic if it last for longer and actually affected the environment like having power outages, property damage to items outdoors, more frequents accidents. Heat waves should also last longer. Both should last for at least a few days especially flooding or you could give us a toggle option for weather events so we can set how many days each lasts for
I’d like to have fog added which could range from slightly foggy to mild and then very foggy to where driving is a serious risk and you have a high chance of getting into an accident
Hail and possibly earthquakes
Fall- having leaves change color and eventually fall off as winter starts to kick in ( would make for pretty pictures during this time as well)
Winter- Blizzards, so being able to freeze to death, small bodies of water freezing over and the ability to go skating on it. Having icicles form on roofs, porches, traffic lights, etc. these can fall and cause injury to zois as well
I hope to eventually see actual changes in the seasons, like more rain in the spring and somewhat in fall. Leaves changing color and starting fall from trees during fall and eventually becoming bare in winter, along with certain plants dying and blooming again in spring. Windy days during fall. Small spots of ice forming on the sidewalks and road, making zois more prone to slipping or crashing during winter and seeing icicles form on the edges of roofs 
. Cherry blossom petals falling!( the perfect kdrama scene lol 
)Not only would this add so much realism but would be perfect for in game photography! Also during fall, having zois rake leaves and places them in bags which could be used for compost or just make big piles of them for children to jump in. For winter it would be nice to get snow storms and see people use snowblowers on the sidewalks and plows coming down the roads and when it ice forms on the sidewalks we could put throw some salt down to get rid of it. Hopefully we get to see this implemented at some point