once you enter it, the the temperature GREATLY increases.   At night, the temperature is quite pleasant... but as soon as the sun comes up, it heats up.  the very middle of the maze is the hottest yet,  as the dome acts as a giant magnifying glass.  That heat generated from the center will spread out through the rest of the maze............ but the wind of the night carries all of the heat out. We can TRY to reach the gem and get out before morning.... but we'll die if we fail......