Excessive heat warnings explained (2024)

Please note: Due to expected high temperatures from July to August 2024, SRP will keep the power on for all SRP customers – even if there is not an Excessive Heat Warning. During this time, you’ll still be charged for the energy you use, so it’s important to keep making payments to avoid accumulating debt.

Summers in Arizona are notoriously hot, and while Arizona residents expect triple-digit temperatures during the summer months, sometimes the weather can become extreme.

In order to keep our customers safe during these extreme temperatures, we partner with the National Weather Service (NWS) and rely on their weather expertise to alert us of upcoming excessive heat events.

Anytime the NWS issues an Excessive Heat Warning, SRP will not disconnect power, regardless of payment status.

In addition, we will not disconnect power for any SRP customers during the months of July and August beginning in 2024. Unless the NWS issues additional Excessive Heat Warnings, normal payment collection will resume after Labor Day.

This applies to all residential customers across all price plans, as well as customers on the SRP M-Power® price plan. If we are in a heat moratorium and money has run out on your SRP M-Power box, the box will alert you of your balance as usual, but your power will remain on.

It is important to note that customers will continue to be charged and accumulate a balance for power that is used during a heat moratorium.

What is an Excessive Heat Warning?

Today, we use weather data provided by the NWS to determine when we need to pause disconnections when an Excessive Heat Warning is called in order to keep our customers safe. This pause is called a heat moratorium.

The NWS issues an Excessive Heat Warning when there is high forecast confidence of a high or very high risk of heat-related illness based on the HeatRisk forecast tool. Since our bodies seasonally acclimate to weather conditions, temperature thresholds for Excessive Heat Warnings are higher during the summer than during late spring and early fall.

That means we could be experiencing triple-digit heat, something we are very familiar with in Arizona, and not be in an Excessive Heat Warning.

How do I know if an Excessive Heat Warning is in effect?

You can always check the status of an Excessive Heat Warning by visiting the NWS website. You can also enroll in alerts and reminders to receive a text or email when an Excessive Heat Warning starts and ends.

How many heat moratoriums should I expect?

The number of Excessive Heat Warnings can vary from summer to summer. Factors such as limited rain during the monsoon season can impact heat relief in the Valley. During the monsoon, forecasting the number of consecutive days with conditions supporting high or very high risk of heat-related illness is challenging because of cooling from rainfall and cloud cover.

Following each summer, SRP meteorologists review the monsoon, placing the weather events in the context of what is expected with climate change and urbanization. This is an important step toward understanding what we can expect of heat risk conditions moving forward.

How do payments work during heat moratoriums?

We highly encourage customers to make regular payments as usual during heat moratoriums to avoid accumulating a high balance of debt.

At the end of the heat moratorium, SRP M-Power customers will need to make a purchase to cover any accumulated debt to avoid disconnection following friendly credit hours (between 8 p.m. and 8 a.m.).

Note: When you sign up for heat warning text and email notifications, we’ll let you know when we expect normal SRP M-Power operations to resume. This way, you can ensure that you have a positive balance before normal operations resume and can avoid disconnection.

Avoid extended call waiting times coming out of heat moratoriums by making regular purchases online, through the SRP M-Power® app or at one of our 600-plus in-person payment locations.

Although the National Weather Service can start and end Excessive Heat Warnings at any time, SRP will not resume regular disconnections on weekends or during friendly credit hours.

Extreme weather disconnect moratoriums

In addition to the NWS issuing Excessive Heat Warnings, they may also issue Freeze Warnings during times of extreme cold weather. SRP will also suspend disconnection of service for nonpayment during these events. It is important to remember that during both Excessive Heat Warnings and Freeze Warnings bills will continue to generate and are due according to SRP standard terms. Late payment fees for past-due bills will continue to be charged; however, accounts will not be disconnected for nonpayment until the disconnection moratorium has ended. If you are having problems paying your bills, please contact us at (602) 236-8888 to discuss your situation.

You can always view your current balance by logging in to SRP My Account™ online or through the SRP Power app™ and SRP M-Power app.

How you can prepare for summer

We know how important it is for our customers to have power, especially during the extreme heat of Arizona’s summers. SRP offers a variety of programs and resources that you can enroll in today to be prepared for tomorrow.

These support programs include:

  • The Economy Price Plan: A $23 monthly bill credit available to customers with limited incomes.
  • The SRP Safety Net program: Sign up a friend or family member to be alerted if your bill becomes past due.
  • The SRP Medical Preparedness Program: Customers with life-support equipment in their homes can enroll to receive notifications of planned outages to determine if they can remain at their home or need to seek temporary accommodations elsewhere.
  • SRP Customer Resource Counseling: Call us 24/7 at (602) 236-8888 for immediate assistance with your bill, including extensions and advances.

In addition to these programs, we have several tips for saving energy and money on your summer electricity bills.


Excessive heat warnings explained (2024)


What is the Excessive Heat Warning? ›

In most areas, a warning will be issued if there is a heat index of at least 105 °F (41 °C) for more than three hours per day for two consecutive days, or if the heat index is greater than 115 °F (46 °C) for any period of time.

What is causing this extreme heat? ›

Climate change caused by greenhouse gases from burning fossil fuels is poised to make heat waves longer, more intense, and more frequent.

What are responses to extreme heat? ›

Drink plenty of fluids to stay hydrated. Avoid high-energy activities or work outdoors, during midday heat, if possible. Check on family members, older adults and neighbors. Watch for heat cramps, heat exhaustion and heat stroke.

How to survive 45 degree heat? ›

When out in direct sunlight remember:
  1. Wear (and regularly reapply) sunscreen.
  2. Cover your head with a hat.
  3. Take regular breaks indoors or in a shady area to avoid getting heat exhaustion or heatstroke.
  4. Wearing light-coloured, loose-fitting clothing will also help you to stay cool.
7 days ago

What is a dangerously high heat? ›

What is the heat index?
ClassificationHeat Index
Caution80°F - 90°F
Extreme Caution90°F - 103°F
Danger103°F - 124°F
Extreme Danger125°F or higher

How do you survive a heat warning? ›

Keep cool: use air conditioning or a fan, wear light and loose-fitting clothing, and keep skin wet, using a spray bottle or damp sponge and by taking cool showers. Stay hydrated: during days of extreme heat, keep drinking water before you feel thirsty, especially if outdoors or performing physical activity.

What was the worst heat wave in the US history? ›

July 1936, part of the "Dust Bowl", produced one of the hottest summers on record across the country, especially across the Plains, Upper Midwest, and Great Lakes regions. Nationally, about 5,000 people died from the heat.

Are summers getting hotter? ›

But is very clear that—with global warming now heating the world to 1.2 degrees Celsius above its average in the late 19th century—summers are dramatically ramping up. “There's no question that summers have changed,” says Kristie Ebi, an epidemiologist who specializes in heat-related health risks.

Why is the world so hot right now? ›

Today, there is so much carbon pollution in the atmosphere that it's causing obvious changes in the weather. There is near complete consensus on this among climate scientists, with over 99% of scientists agreeing that humans are causing climate change. And, it will get increasingly hotter until we eliminate pollution.

How to survive extreme heat without air conditioning? ›

Use box fans and ceiling fans to promote air circulation throughout your home. Opening doors in the house and using box fans to push hot air outdoors can function as an "exhaust" system and draw cooler evening air into the house. In the cooler evenings, open all windows and promote as much air circulation as possible.

What temperature is unsurvivable? ›

Even a healthy young person will die after enduring six hours of 35-degree Celsius (95 Fahrenheit) warmth when coupled with 100 percent humidity, but new research shows that threshold could be significantly lower.

How to cool down yourself from a hot day? ›

6 Ways to Stay Cool in Extreme Heat
  1. Drink water. Keep you and your pets hydrated. ...
  2. Find air conditioning. If your home does not have air conditioning, go to the shopping mall or public library. ...
  3. Insulate your house. ...
  4. Wear sunscreen. ...
  5. Never leave pets or people in a closed car. ...
  6. Avoid strenuous activities.
Jun 29, 2021

Does keeping a bucket of water in the room cool? ›

Keeping a bucket containing water will certainly cool down the surrounding air. * The water will evaporate over time - in order to move from liquid to gas it needs to gain energy, and it does this by taking some of the heat energy out of the surrounding air.

How to cool down quickly in bed? ›

Here are some DIY tricks to keep you cool during the summer heat for a great night's sleep, without blowing the budget.
  1. Open the windows. If your room is warmer than outside, leave the windows open at night to let in a fresh breeze. ...
  2. Get a fan. ...
  3. Drink more water. ...
  4. Have a warm shower before bed. ...
  5. Sleep on ice. ...
  6. A damp compress.

What is the OSHA warning for heat? ›

California's Heat Illness Prevention Standard requires employers to provide training, water, shade, and planning. A temperature of 80°F triggers the requirements.

What temperature range is excessive heat? ›

According to new research from the University of Roehampton in England, the human body may lose the ability to rid of excessive heat and stop functioning optimally when outside temperatures reach beyond 40 degrees Celsius (104 Fahrenheit).

What is a Level 3 heat warning? ›

Level 3 – Amber – Heatwave action

This is when the threshold temperature has been reached for one full day and the following night, while the following day also has a 90% chance of hitting the threshold temperature again.

What temperature is considered high heat? ›

While any temperature above your normal temperature range is considered a fever, there are different levels of fever severity: Low-grade: 99.1 to 100.4 F (37.3 to 38.0 C) Moderate-grade: 100.6 to 102.2 F (38.1 to 39.0 C) High-grade: 102.4 to 105.8 F (39.1 to 41 C).


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