DES MOINES, Iowa—The National Weather Service office in Des Moines expanded the Fire Danger area being affected Friday.

URGENT - FIRE WEATHER MESSAGE
National Weather Service Des Moines IA
1050 AM CDT Fri Apr 2 2021

...Elevated Fire Danger Today...

.Strong south winds of 25 to 35 mph with higher gusts over 40 mph
possible along with very low humidity values and dry or dead
vegetation has led to the potential for elevated fire danger
today. Burning is not recommended.

...RED FLAG WARNING IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR
EXTREME FIRE CONDITIONS....

The National Weather Service in Des Moines has issued a Red Flag
Warning FOR EXTREME FIRE CONDITIONS, which is in effect until
8 PM CDT this evening.

* Relative Humidity...As low as 21 percent.

* Impacts...Any fires that develop today may spread rapidly and
  become uncontrollable.

* WIND...Strong south winds with sustained speeds of 25 to 35 mph,
  with gusts as high as 45 mph possible. The strongest wind gusts
  are likely to occur in western portions of Iowa.

* FUEL...Prairie grasses and other vegetation remains dry or dead
  and will easily ignite. Plus, any lingering crop debris could
  quickly burn in these conditions. The combination of all the
  aforementioned aspects will lead to extremely fast fire growth.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.