Orange County Outdoors on Instagram: "What are these distant clouds we’ve been seeing during this heat wave? They’re called cumulonimbus clouds but some of you might know them as thunderheads, mushroom clouds, or anvil clouds. You can typically find heavy rain with lightning/thunder under these and they commonly form an anvil shape as they collapse. These are the most feared clouds due to their extreme unstableness. They can cause flash floods while hikers downriver have clear skies above them.

The Mighty Cumulonimbus: Nature’s Towering Storm Giants