KANSAS CITY, Mo. — A spokesperson for Evergy said extreme heat and high demand for power caused a transformer to fail, leading to power outages in parts of Kansas City, Missouri.

Reports of outages began at around 4 p.m. on Monday afternoon.

Evergy didn't immediately have an estimate on how long it might take crews to restore power.

Due to the outages, the National Weather Service encouraged people to check on those it calls "more vulnerable."

This includes pregnant women, new born babies, children, elderly people and those with chronic illnesses.

We are getting reports of power outages in the metro area. Now is the time to check on those, especially those are more vulnerable to the extreme heat! pic.twitter.com/JBSRpy0o3O

Earlier Monday, Evergy announced it was implementing an “energy savings event” between 4 and 6 p.m. Monday

Due to the forecasted high heat, we've called an energy savings event to take place today from 4-6 p.m. How do energy savings events work? See tweet below: pic.twitter.com/yTQoo9ajnG