Nehemiah 7 Sun is Hot

Verse 3  I said to them, “The gates of Jerusalem are not to be opened until the sun is hot. While the gatekeepers are still on duty, have them shut the doors and bar them. Also appoint residents of Jerusalem as guards, some at their posts and some near their own houses.”

I'm in Nehemiah 7 and it spoke on keeping the gates closed until the sun is hot. It reminds me of when some of us have fallen asleep spiritually and we need each other to keep each other burning hot like coals.