Schools Continue to Manage the Heat
July 16, 2015
By Rob Kaminski
MHSAA benchmarks editor
It certainly was not the MHSAA’s intent to spur the most historically frigid back-to-back winters the state has seen. Nor did the Association wish for one of the mildest summers in recent memory during 2014.
Seemingly, it’s just Mother Nature’s way of reading into MHSAA efforts for managing heat and humidity and acclimatizing student-athletes for warm-weather activities.
Since guidelines were put in place (recommended for regular-season sessions and required for postseason tournaments) before the 2013-14 school year, there have been relatively few days during which psychrometers have had to be implemented.
“The key is, we’ve got plans in place for when the climate returns to normal trends for return-to-school practices and contests in August and September, as well as early June events,” said MHSAA Executive Director Jack Roberts. “It is a bit ironic that there have been relatively few days since the guidelines were established that they’ve actually come into play.”
In a nutshell, the guidelines provide instruction for four ranges of heat index: below 95 degrees; 95-99 degrees; 99-104 degrees, and heat indexes above 104 degrees, with increasing precautions in place as heat indexes rise. An index above 104 calls for all activity to cease.
Certified athletic trainers Gretchen Mohney and James Lioy agree that recent requirements in heat and hydration guidelines are a step in the right direction and encourage that – when possible – an athletic trainer oversee the implementation. Simply taking a reading from just outside the AD’s office or at home does not simulate on-site conditions.
“This doesn’t take into account the radiant heat at the site, which can drastically affect the conditions that athlete plays in. It is essential that all parties involved in making decisions to play collaborate with one another,” Mohney said.
Heat-related deaths in athletics rank only behind cardiac disorders and head and neck injuries, but such fatalities might lead the way in frustration for families and communities of the victims. The reason? Heat-related illness is totally preventable.
Another source of mild frustration is the lack of recording within the state for those practice and game situations which warrant heat protocols.
When the Representative Council was formulating the Heat and Humidity Policy, it was also mindful of ways in which the MHSAA could assist schools in putting the plan into practice. Coaches, athletic directors and trainers needed a method to record information for athletic directors to view and for the MHSAA to track. The MHSAA developed interactive web pages on MHSAA.com which allow registered personnel to record weather conditions as practices and contests are taking place, using psychrometers.
Additionally, discounted Heat and Humidity Monitors and Precision Heat Index Instruments are offered to schools through a partnership between the MHSAA and School Health.
Yet, since the availability of such tools came to fruition two years back, fewer than 1,000 entries have been recorded, and many are multiple entries from the same schools.
Of the 772 entries, only 15 took place when the heat index was in excess of 104, while just 21 indicated an index of greater than 100. Cooler temperatures could be playing a factor in the overall number of participation, particularly in the northern areas of the state.
Nearly all of the responses came during fall practices, with a few isolated cases coming during the spring.
As Mohney pointed out, all resources must be properly used in concert with one another to achieve desired results.
Reminders of the tools available to schools are disseminated throughout the state each summer.
South Lyon United's Radcliffe Approaching Milestone Win, Another History-Making Moment
By
Keith Dunlap
Special for MHSAA.com
May 7, 2026
Originally, Deanna Radcliffe got into coaching lacrosse simply because it was a nice summer job.
From that simple beginning, Radcliffe is now on the verge of making high school sports history within the state of Michigan.
No girls or boys lacrosse coach has reached 300 career victories since the sport became MHSAA-sponsored in 2005. But Radcliffe is oh-so-close. Following a win over Haslett on Wednesday, Radcliffe has 299 career victories.
The milestone 300th win likely will come Saturday when South Lyon United plays in a tournament at Saline.
In order to get their names etched in the record book, any high school coach in Michigan has had to reach at least 300 wins since the MHSAA brought the sport into its championship lineup. So Radcliffe is literally about to become the first and only coach in the MHSAA coaching records for lacrosse.
Radcliffe is in her 10th season coaching for South Lyon Unified and also coached at Hartland from 2013 to 2022. This is actually her second stint at South Lyon, where she spent seven years as head coach before taking the Hartland job.
“It just means I’ve been doing this for a long time,” Radcliffe said. “What it really represents to me is all the players, coaches and families I’ve had the opportunity to coach. I’ve been fortunate to coach in an area that was willing to embrace the sport. I have been able to catch some really great teams and athletes across all levels from youth to high school and even collegiately. That’s the part that means the most, those relationships and experiences. The wins are just a byproduct of that.”
Radcliffe got her start in lacrosse very young, saying she picked up the game at 3-4 years old while growing up in Pennsylvania. She was introduced to the game by her aunt.
“It just became part of my life early on,” she said.
Radcliffe eventually became good enough as a player to earn a college opportunity, ultimately being named the Atlantic 10 Offensive Player of the Year in 2003 while playing for Temple.
Radcliffe eventually started a career as a special education teacher and was a high school coach in Pennsylvania before moving to Michigan in 2006, where she has coached club, high school and even college lacrosse as she spent time as an assistant at Cleary University.
“I just enjoyed being around the game and the competitive environment, so I kept doing it,” Radcliffe said of what has kept her coaching. “Over time, it stopped being something I was just doing in the summers and became something I really valued and stayed connected to. It’s grown naturally from there, and I’ve been fortunate to continue coaching while also working in education.”
The most noteworthy win of her career came last June, when South Lyon Unified earned a 6-3 Division 1-clinching victory over Hartland to give Radcliffe her first MHSAA Finals championship as head coach in a matchup between the two programs she built up.
South Lyon Unified is 18-0 this season and has won 39 straight games going back to last spring's opener.
“She has so much knowledge of the sport and really cares for each and every one of us,” said South Lyon United senior captain Teagan Wesner. “Deanna has been one of the best coaches I have ever had, and I am extremely grateful to have had the opportunity to play for her. I am very happy for Deanna, and I am excited to be a part of the team who helped her reach 300 wins.”
When Radcliffe first arrived in Michigan, lacrosse was in its first years as a sanctioned sport by the MHSAA. Now, she has seen it grow by leaps and bounds.
“One of the most rewarding parts has been seeing the long-term impact,” she said. “Many of the players I once coached are now youth, high school or college coaches themselves. Some are officials, and some I’m even coaching against or alongside now. That’s been incredibly meaningful and really speaks to the strength of the community the sport has built.”
Keith Dunlap has served in Detroit-area sports media for more than two decades, including as a sportswriter at the Oakland Press from 2001-16 primarily covering high school sports but also college and professional teams. His bylines also have appeared in USA Today, the Washington Post, the Detroit Free Press, the Houston Chronicle and the Boston Globe. He served as the administrator for the Oakland Activities Association’s website from 2017-2020. Contact him at [email protected] with story ideas for Oakland, Macomb and Wayne counties.
PHOTOS (Top) Deanna Radcliffe, here during the 2025 Division 1 Final, has reached 299 career coaching wins. (Middle) Radcliffe raises the championship trophy after last season’s clincher.