Illinois, 1999

Heat in Illinois, August 16 to 17, 1999

August 16 to 17, 1999 · NWS LOT · 2 events in 2 counties and zones

Two heat related deaths occurred in the Chicago metropolitan area over a 36 hour period with maximum daytime heat indices in the upper 80s and nighttime heat indices in the upper 70s.

The toll

Deaths
2
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS LOT wrote it up.

Two heat related deaths occurred in the Chicago metropolitan area over a 36 hour period with maximum daytime heat indices in the upper 80s and nighttime heat indices in the upper 70s.

Event by event

2 heat. Local standard time, as filed.

Heat, Cook

When
August 16, 10:00 AM CST to August 17, 10:00 PM CST
Where
Cook forecast zone
Deaths
1 direct, 0 indirect
Reported by
GOVT OFFICIAL

Heat, Will

When
August 16, 10:00 AM CST to August 17, 10:00 PM CST
Where
Will forecast zone
Deaths
1 direct, 0 indirect
Reported by
GOVT OFFICIAL

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

EventDateAgeSexWhereKind
Heat, Cook1999-08-1655MalePermanent HomeDirect
Heat, Will1999-08-1753MalePermanent HomeDirect

What these are

Heat
Heat below excessive heat criteria that still caused deaths, injuries or significant impacts.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Illinois in 1999Every state in 1999This day in weather historyWarnings in Illinois, August 1999

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5714288, 5714289.