> I don't know why but the bad weather is causing people to speed and be aggressive when they should be more cautious.

Fog has a weird perception effect where people think they're driving slower than they actually are. That causes people to speed up, especially if they want to keep their eyes focused on the road due to limited visibility rather than glancing down at their speedometer.

It's also a lesser effect with rain, although that mostly seems like a conflict between people who want to slow down in wet weather and those who want to go the normal speed, causing crashes as the faster traffic jumps lanes to get around slower traffic with lower visibility and lower traction.