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7
Very High

extreme-heat Extreme Heat Risk in Jacksonville, FL

Risk Level: Very High — Score 7/10

FEMA: 7Historical: 9

Key Risk Factors

  • FEMA rates Jacksonville's county as Relatively High risk
  • Estimated annual loss of $9M from this hazard type
  • 3 events on record in proximity
  • 3 event(s) in the last 12 months
  • Average annual frequency: 4.6 events per year

Peak season: June-September

Last significant event: Cold Weather - Southeast Georgia, United States (2026-01-27) — 381,000 people exposed

Highest Risk Cities for Extreme Heats

1
Chicago, IL
FEMA: 9Historical: 8
2
Houston, TX
FEMA: 9Historical: 0
3
Phoenix, AZ
FEMA: 9Historical: 10
4
Philadelphia, PA
FEMA: 9Historical: 10
5
Dallas, TX
FEMA: 9Historical: 10
6
Las Vegas, NV
FEMA: 9Historical: 10
7
Tucson, AZ
FEMA: 9Historical: 0
8
Mesa, AZ
FEMA: 9Historical: 10
9
New York, NY
FEMA: 7Historical: 10
10
Los Angeles, CA
FEMA: 7Historical: 10
Jacksonville is not in the top 10 for extreme heat risk among tracked cities.

How Jacksonville Compares

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Notable Extreme Heat Events Near Jacksonville

Heat - Northeast Florida and Southeast Georgia, United States

August 12, 2025 — ADVISORY

Impact data not available

Cold Weather - Northeast _ north-central Florida, United States

January 18, 2026 — ADVISORY

2,600,000 people exposed; $302,578M capital exposed

Cold Weather - Southeast Georgia, United States

January 26, 2026 — ADVISORY

381,000 people exposed; $44,488M capital exposed

Extreme Heat Preparedness Tips

  • 1.Stay hydrated — drink water regularly even if you don’t feel thirsty
  • 2.Avoid outdoor activities during peak heat hours (10 AM – 4 PM)
  • 3.Know the signs of heat exhaustion and heat stroke
  • 4.Check on elderly neighbors and those without air conditioning
  • 5.Never leave children or pets in a parked vehicle

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