Wildfires
These days, wildfires are all too common, and when summer arrives, you can almost expect that more will wreak havoc in various regions of the country, most likely in California. They cause enormous amounts of harm. The 2020 fires resulted in at least 30 fatalities. 106 people passed away in 2018. The economic totals were likewise difficult to comprehend, with the predicted $400 billion cost for 2018 being the highest.
It makes sense that such destructive fires would produce such a huge wall of smoke that the sky itself would turn black, given their far-reaching effects. San Francisco had a hazy glow in the sky due to the fires in 2020, which prevented the sun from shining on the city. The same thing happened in British Columbia in 2018, obstructing the sun.