I sincerely apologize for the crap level of this translation. Please disregard when someone competent translates this:
It's august, and the city is experiencing a record heat wave. The pavement still shimmers even when the sun goes down. "without sleeping, Marisa was heading to a certain placeA Marisa is headed to a place to take it easy. She knows that the manhole gets cool at night, so she and other yukkuri can sleep in it.
"A cold iron lid is cool and easy"The next day is much hotter, and they are all slowly roasted on the manhole rather than get off onto the hot pavement.
They will all sleep easy this day. It's a nice day.