GRAND RAPIDS, Mich. (WOOD) — Grand Rapids Public Schools has canceled classes for the rest of the week due to heat.

“I’m calling it!” Superintendent Leadriane Roby tweeted Wednesday evening. “All GRPS schools will close Thursday and Friday due to the extreme heat. Some of our buildings do not have AC and the unseasonably warm weather makes holding class uncomfortable and difficult.”

GRPS said eight schools in the district do not have air conditioning.

The superintendent of Hudsonville Public Schools announced on Twitter Thursday that classes were canceled for Friday, citing “extreme heat.” He said the Early Childhood Center would be open for day care.

Muskegon Public Schools is taking a half day of school Friday, according to a post on its Facebook page. Elementary schools will dismiss at 12:15 p.m. and secondary schools will dismiss at 11:21 p.m.

High temperatures are expected to near 90 degrees on Thursday and Friday, Storm Team 8 says. Similar temperatures will continue through Saturday before dipping into the 80s on Sunday.

The district’s last day of school for the year is scheduled for June 9.