Weather Service in Chicago (NWS) has issued an excessive heat watch for
Northwest Indiana, in effect today through 7 p.m. Saturday, July 20.
A multiple day
episode of dangerous heat is expected later this week centered on Friday
into the start of the weekend. This heat will expand into the area on
Thursday afternoon and persist through Friday and into Saturday.
There is a
potential for showers and thunderstorms on Thursday morning which may keep
the rest of the day cooler than forecast, but confidence is increasing in
dangerous heat arriving by Friday.
In addition, there
will be little relief from the heat overnight Thursday and Friday, with the
urban heat island core of Chicago most susceptible to night time
temperatures which do not cool significantly, limiting the amount of relief
that can occur at night.
will peak in the 90s each day, with Friday and Saturday potentially in the
upper 90s to near 100 degrees. Maximum heat indices: peaking to 102 to 112
each day. Low temperatures will drop only to the upper 70s to near 80 on
Thursday and Friday nights.
effects of temperatures and heat index values this high could lead to heat
related illnesses with prolonged exposure,” NWS said. “Those without air
conditioning, elderly, small children, and pets are especially susceptible.
Plan ahead. Have a cool place to shelter from the heat. Avoid outdoor
activity, especially strenuous ones, during the peak heating times of the
day. Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.”