Miami is waking up mostly clear this Saturday with morning temperatures near 81°F, but the holiday heat is poised to crank up fast. A Heat Advisory is in effect across the metro area and forecasters say heat index values could climb into the 105 to 110°F range this afternoon, with scattered showers and thunderstorms developing after mid-morning. Expect a high near 89°F with south winds of about 6 to 9 mph. If you are heading outside, keep water, shade and a weather app close.
Heat Advisory Through the Evening
The National Weather Service has issued a Heat Advisory for metro Miami-Dade, Broward and Palm Beach from 11 AM to 8 PM, according to NWS Miami. Forecasters are calling for peak heat index values between 105°F and 110°F and urge everyone to "Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors." If your plans involve grilling, yard work or outdoor events, try to move the heavy lifting into the morning or later in the evening when the sun is not as brutal.
Afternoon Storms Could Bring Heavy Downpours
Scattered to numerous thunderstorms are likely this afternoon as sea-breeze boundaries and storm outflows collide over South Florida. These storms could pack frequent lightning, brief but heavy rain and isolated wind gusts near 45 mph. Because storms are expected to move slowly, localized urban flooding is possible where downpours linger.
What To Know For Events And Travel
If you are headed to fireworks, beach gatherings or park events, plan for a one-two punch of steamy heat and fast-building storms. Downpours can quickly cut visibility, slick up roads and briefly stall traffic. Bring plenty of water, wear light and breathable clothing, and give yourself extra travel time. Once the rain hits, flip on your headlights, slow down and leave extra space between cars.
Where To Cool Off
The City of Miami operates a network of park community centers that serve as cooling centers during the May through October heat season, with county libraries and parks adding additional locations. For the full list of sites and hours, check the city's cooling centers page at City of Miami cooling centers, or call 311 for assistance finding a spot to cool down.
Quick Safety Checklist
Stay hydrated, check in on older neighbors and anyone without air conditioning, and keep pets indoors or in shaded, well-ventilated areas. If someone shows signs of heat exhaustion, such as heavy sweating, weakness, dizziness, nausea or fainting, move them to a cool place, offer sips of water if they are able to drink, and call 911 if symptoms worsen or do not improve.
