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Record-breaking heat in Colorado this week has prompted public schools without air conditioning to close or announce plans to send students home early.

More than 30 Denver schools are calling “heat days,” according to a district news release. Most schools are releasing students early Wednesday and Thursday, but four schools are closing altogether for at least one day this week.

They include:


Melanie Asmar has covered Denver Public Schools for Chalkbeat Colorado since 2015. Asmar previously worked at Westword newspaper in Denver and for a daily newspaper in New Hampshire, where she covered education. Chalkbeat is a nonprofit...