Heat Advisory 21, NWS Melbourne, FL

Issued

Aug 19, 2026, 12:10 AM EDT (04:10 UTC)

In effect from

Aug 19, 2026, 10:00 AM EDT

Expired

Aug 19, 2026, 8:00 PM EDT

In force

10 hr

Issued by

NWS Melbourne, FL

Counties Brevard County, FL, Indian River County, FL, Lake County, FL, Martin County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Saint Lucie County, FL, Seminole County, FL, Volusia County, FL

The Melbourne radar (KMLB), 30 km from the middle of the area, began a volume at 04:14 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

371 
WWUS72 KMLB 190410
NPWMLB

URGENT - WEATHER MESSAGE
National Weather Service Melbourne FL
1210 AM EDT Wed Aug 19 2026

FLZ041-044>046-053-058-141-144-154-159-164-247-254-259-264-347-447-
547-647-747-200000-
/O.NEW.KMLB.HT.Y.0021.260819T1400Z-260820T0000Z/
Inland Volusia-Northern Lake-Orange-Seminole-Osceola-Okeechobee-
Coastal Volusia-Southern Lake-Coastal Indian River-Coastal Saint
Lucie-Coastal Martin-Inland Northern Brevard-Inland Indian River-
Inland Saint Lucie-Inland Martin-Mainland Northern Brevard-
Northern Brevard Barrier Islands-Inland Southern Brevard-Mainland
Southern Brevard-Southern Brevard Barrier Islands-
Including the cities of Mount Dora, Deltona, Stuart, Winter Park,
Deland, Basinger, Melbourne Beach, Daytona Beach, Sebastian, Tavares,
Mascotte, Cocoa Beach, Winter Springs, Fort Pierce, Leesburg, Saint
Lucie West, Mims, Titusville, Ormond Beach, Tradition, Viera West,
Union Park, Orlando, Altamonte Springs, Saint Cloud, Port Saint
Lucie, Clermont, Celebration, New Smyrna Beach, Casselberry, Merritt
Island Wildlife Refuge, Maitland, Sanford, Fort Drum, Port Saint
John, Canaveral Groves, Groveland, Vero Beach, Okeechobee, Cocoa,
Jensen Beach, Palm Bay west of I
95, Indiantown, Oviedo, Melbourne, Debary, Rockledge, Hobe Sound,
Playalinda Beach, Kissimmee, Fellsmere, Satellite Beach, Apopka, and
Eustis
1210 AM EDT Wed Aug 19 2026

...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 8 PM EDT THIS
EVENING...

* WHAT...Heat index values 108 to 112 expected.

* WHERE...Portions of east central Florida.

* WHEN...From 10 AM this morning to 8 PM EDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors. Young children and
pets should never be left unattended in vehicles under any
circumstances. Take extra precautions if you work or spend time
outside. When possible reschedule strenuous activities to early
morning or evening. Know the signs and symptoms of heat exhaustion
and heat stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational Safety
and Health Administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.

&&

$$

Tollefsen

Heat Advisories in Florida, 2026Every heat advisory in 2026

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.