Heat warning. The National Weather Service has issued an extreme heat warning from 10 a.m. Saturday to midnight Monday. Local cooling centers are prepared to help anyone who needs shelter in the coming days. Temperatures are expected to be the 90s and peak afternoon heat index values of 100 to 105 degrees are expected.

Homewood Outdoor Farmers Market. The market will be open from 8 a.m. to 1 p.m. in Martin Square on Martin Avenue between Chestnut and Ridge roads in downtown Homewood. Vendors will offer fresh produce, baked goods, handcrafted jewelry, skincare and more. Food trucks will be on hand and ready-to-eat meals will be available.

STEM Saturday. The theme of the session from 10 a.m. to 1 p.m. is “Let’s Make Ice Cream” at Homewood Science Center, 18022 Dixie Highway.

Barb & Dan’s Road Ride. Riders of all experience levels can join the group which leaves at 8 a.m. from GoodSpeed Cycles, 2125 183rd St. in Homewood. There is a no-drop group that rides about 20 miles and stronger riders sometimes go farther. Helmets required, daytime lights strongly recommended.

Off-leash Ride. A leisurely just-riding-around nine-mile ride every Saturday. Route includes Butterfield Creek bike path, Rovers Run and Izaak Walton Preserve. Starts at GoodSpeed Cycles, 2125 183rd St., at 8:30 a.m. sharp, ends back at the shop 9:45ish for donuts.