The leaves are falling, coating the ground in a sea of orange and yellow.
If you have trees anywhere near your yard, you'll probably have to bust out the rake (or lawn mower) to clean up before winter comes. But don't forget about your sidewalks and curbs.
Those little leaves can cause big problems if they get into storm drains, especially when the weather is rainy like this weekend.
Leaves are bad for lakes
The state Pollution Control Agency explains how leaves on roads and along curbs get into storm drains and ultimately end up in lakes and rivers.
That's not a good thing because nutrients from the leaves feed unwanted algae growth. And when all that algae dies, it decomposes and uses up oxygen that fish and plants need.
Officials say that in the Mississippi River-Twin Cities watershed, 87 of 180 lakes didn't meet water quality standards because of excess nutrients. And depending on the lake, leaves might account for 60 percent of the excess nutrients in those lakes.
On top of that, leaves can clog storm drains and cause giant puddles or even flooding.