At least 16 people have died at the park this year, including five fatalities in August alone. No single factor is to blame, but several deaths have followed stretches of extreme weather.
The restrictions will run throughout the Labor Day holiday when hotels are near or at capacity. It's an unprecedented move, even for a water line that has experienced frequent failures.
In all three cases, no cause of death has yet been released yet. The National Park Service is advising visitors to avoid hiking in the inner canyon during during daytime summer high temperatures.
One person was killed in a tour bus rollover involving over 50 people Tuesday in northern Arizona near the Grand Canyon West Skywalk, authorities said.
A major storm system pummeling the Great Plains region will move east and impact travel into the Northeast by Sunday. And a second system is bearing down on Northern California.
Park Superintendent Christine Lehnertz has been cleared of allegations of creating a hostile work environment in a report by the Inspector General of the Interior Department.
When the Grand Canyon became a national park 100 years ago, native tribes who lived in the canyon were pushed aside. Now the park service is working with them to design a new cultural heritage site.