A drop, then a rebound.
The 12 and 17 June 2014 curves show lower load around the games and recovery afterward. ONS relates changed load patterns to changed routines.
Observed load + operational reportONS · 2014 / 2015A Global Perspectives investigation
This website turns evidence into action.
How do big events in Brazil affect the energy consumption of the country?
Two extraordinary events. One complex electricity system. Follow the evidence from the 2014 World Cup to Rio 2016.
Most event data here concern electricity demand/load, which is only one part of national energy use.
BRAZIL / UNDER THE FLOODLIGHTS
The lights are only
part of the story.
BRAZIL · INTERCONNECTED SYSTEM / HOURLY MEAN LOAD−24.7%
12 June 2014, 17:00 vs 5 June, 17:00. A difference between days, not a measured causal saving.
Operador Nacional do Sistema Elétrico (ONS)RIO CITY / DURING GAMES / QUALITATIVE DEMAND REPORTLocal rise
U.S. Energy Information Administration (EIA) reported higher city demand on 11 August 2016. No magnitude was given.
U.S. Energy Information Administration (EIA)BRAZIL / WHOLE YEAR / GRID ELECTRICITY CONSUMPTION−0.9%
2016 compared with 2015. The national annual trend is not an estimate of the Olympic Games’ effect.
Empresa de Pesquisa Energética (EPE) · 2017Three different indicators and time scales. Do not compare their magnitudes directly.
01
Energy in Brazil
A country is bigger than a stadium.
Much of the event evidence measures electricity demand or load, not all energy used in Brazil.
Power / demandHow quickly electricity is being used.kW · MW · GW
Energy / consumptionHow much electricity is used over time.kWh · MWh · TWh
Equipment capacityWhat equipment can handle, not what it used.MW ≠ MVA ≠ MWh
Data institutions and units: Operador Nacional do Sistema Elétrico — Brazil’s National System Operator. Coordinates generation and transmission in Brazil’s interconnected electricity system. · Sistema Interligado Nacional — National Interconnected System. The connected Brazilian grid; it does not include every isolated electricity system. · Empresa de Pesquisa Energética — Energy Research Office. Publishes official energy balances and statistics for Brazilian energy planning. · U.S. Energy Information Administration. A United States government agency that publishes energy data and analysis. · Megawatt. A unit of power: 1 MW = 1,000 kW. MWh measures energy over time. GW = 1,000 MW; TWh = 1,000,000 MWh.
Renewable shares, Brazil · 2016
EPE · National Energy Balance 2017 · base year 2016Electricity is one part of energy.
The electricity mix describes electricity sources; the broader energy mix also includes transport fuels, industrial heat, cooking and other uses.
These historical supply shares include imports. They describe 2016, not the present-day mix.
520.0 TWhTotal final electricity consumption · 2016
578.9 TWhDomestic generation · 2016
460.8 TWhGrid electricity consumption · 2016
Total final consumption includes the interconnected system, isolated systems and self-production. The grid-sector chart uses a narrower boundary; these totals cannot simply be subtracted as “waste”.
EPE · 2017EPE · total final consumption · p. 3002
Two main case studies
Go beyond the floodlights.
Open each case to separate planning, observations and the limits of the evidence.
Photographs: Maracanã in 2015 and Olympic Park in May 2016. Credits and licences in Sources. Fédération Internationale de Football Association. The international football governing body and World Cup organizer.
Bonus comparisons
Two smaller comparisons add context.
03
Explore the evidence
Change the view. Test the story.
Seven Brazil matches in 2014. Regional and national observations. Every comparison keeps its source and scale.
Brazil × Croatia · 12 Jun 2014
Brazil · interconnected system · hourly mean load · GWKickoff: 17:00 · São Paulo · UTC−03:00 · Group stageSolid line + dots: match day · 12 Jun 2014Dashed: reference · 5 Jun 2014
ONS hourly data · project calculations1 GW = 1,000 MW. Original ONS hour labels retained.
Reference: 5 Jun 2014. Same weekday before the tournament; selected to avoid another World Cup day. Weather, holidays and work schedules are not controlled. The gap is not a causal estimate.
00:00 · 55.299 GWReference: 54.688 GW · 5 Jun 201412 Jun 2014 · Brazil · interconnected system · ONS
Hourly averages cannot resolve halftime spikes. The match window is approximate; Brazil–Chile includes extra time and penalties. During-window readings describe hours, not an event-only energy total.
Operador Nacional do Sistema Elétrico — Brazil’s National System Operator. Coordinates generation and transmission in Brazil’s interconnected electricity system. · Sistema Interligado Nacional — National Interconnected System. The connected Brazilian grid; it does not include every isolated electricity system. · Megawatt. A unit of power: 1 MW = 1,000 kW. MWh measures energy over time. GW = 1,000 MW; TWh = 1,000,000 MWh.
04
What actually changed?
More energy? It’s more complicated.
A place, a time and an indicator belong with every claim.
A busier host city.
The energy agency reported higher demand in Rio during the Olympics. It did not quantify separate contributions from hotels, transport or homes.
Qualitative city-level reportSlade Johnson & Kirstin Berndt · 11/08/2016Reliability takes preparation.
Redundant supply and resilience matter even when aggregate load falls. Additional capacity is not proof of additional electricity consumed.
Documented infrastructureMME · Ministério de Minas e Energia · 28/03/2016Key distinctions
Keep the scale in view.
RIO CITY ≠ BRAZIL
A local result cannot stand for the whole country.
LOCAL DEMAND ≠ NATIONAL CONSUMPTION
Different geography and different indicators.
ONE MATCH ≠ ONE YEAR
Hours and annual totals answer different questions.
ELECTRICITY DEMAND / LOAD ≠ ELECTRICITY CONSUMPTION
A rate of use versus energy accumulated over time.
POWER (kW / MW) ≠ ENERGY (kWh / MWh)
Energy = average power × elapsed time.
MW ≠ MWh
1 MW used for 1 hour equals 1 MWh.
MW ≠ MVA
Active power and apparent power are different.
INSTALLED CAPACITY ≠ ACTUAL ELECTRICITY USED
Equipment capability is not a meter reading.
BRAZILIAN ENERGY MATRIX ≠ BRAZILIAN ELECTRICITY MATRIX
The energy mix includes fuels as well as electricity.
CORRELATION ≠ CAUSATION
Occurring together does not establish a cause.
05
From evidence to everyday choices
Energy Calculator
Compare realistic ways to avoid waste while keeping the electricity people need.
What does your appliance use?
Illustrative inputs · use your device’s rating
1.00 h / day
Daily use6.00kWh
Monthly use180.0kWh
With less unnecessary use150.0 kWh / month
30.0 kWh saved per month
kWh = watts ÷ 1,000 × hours
Monthly estimate = daily kWh × 30
Constant average input power assumed. Devices cycle and vary; cooling capacity is not electrical input power. Values are estimates, not measured savings.
What if we did it together?
Scale the same action from the calculator.
ILLUSTRATIVE MONTHLY SAVING30,000.0MWh / month
30.00 kWh per person × 1,000,000 people
Same action, every day, for 30 days, with no extra use elsewhere. A scenario, not a forecast. 1 MWh = 1,000 kWh.
Individual action supports efficiency. Reliable infrastructure, energy access and public policy also matter.
Energy Waste
Illustrative avoided use over 30 days. Fixed power assumptions; not survey results.
Air conditioner1,000 W · 1 hour less/day
30.0 kWhElectric shower5,500 W · 3 minutes less/day
8.25 kWhTelevision100 W · 1 hour less/day
3.0 kWhLED bulb10 W · 1 hour less/day
0.3 kWhPower × avoided time explains the difference. Prioritize unnecessary high-power use while preserving essential comfort and hygiene. Light-emitting diode. A lighting technology; wattage is electrical power, while brightness must also be considered.
GOAL7
The wider purpose
Affordable and clean energy.
Sustainable Development Goal. One of the United Nations’ global development goals. Goal 7 concerns affordable and clean energy. 7. Efficiency connects this research to everyday energy decisions.
United Nations · official Goal 7 targets7.3 — Energy efficiencyDouble the global rate of efficiency improvement by 2030.
7.1 · AccessReliable, affordable modern energy.
7.2 · RenewablesIncrease the renewable share in energy.
06
Practical action
Measure first. Change what matters.
Start with avoidable use.
Project recommendations informed by energy-efficiency goals, operational planning and the calculator’s assumptions.
- 01Check appliance power and time in use. Compare actions in the calculator.
- 02Switch off unused equipment while keeping essential comfort and safety.
- 03Compare efficiency for the same useful service, such as equal light output.
Our proposed solution
This website turns
evidence into action.
Research Data Visualization Awareness Practical action
Our main solution is this website: a way to question claims, explore evidence and estimate realistic savings. Education and better decisions can reduce unnecessary waste; they do not replace changes in infrastructure and energy policy.
Try one change in the calculatorOur answer
Major events can change where and when electricity is used.
They can raise demand in a host city while load falls around a match, then rebounds. They also require careful system preparation. The evidence does not establish one causal increase in Brazil’s annual energy consumption.
Major events make unusual demand patterns visible. Understanding these patterns helps us choose realistic ways to avoid waste every day.
See the sources and limitations07
Sources & methodology
The evidence stays attached.
Observed data, model estimates and illustrative calculations are identified separately. Checked 22 September 2026.
Hourly and monthly load
Sum the four ONS subsystems to obtain the interconnected system. All plotted timestamps contain all four values. Divide MW by 1,000 for GW. Rio context averages all hours in each full calendar month.
Reference days
2014 references are the same weekday before the tournament; each exact date is printed below its chart. The 2019 final uses 30 June, the reference chosen in the ONS bulletin. This does not control weather or activity.
Time and units
Original ONS timestamps are retained without timezone conversion. Kickoffs are stated in Brasília time (UTC−03:00). Highlighted hourly windows are approximate, with three hours for Brazil–Chile. Hourly means cannot resolve halftime.
Inference limits
The 2017 EPE publications provide one historical snapshot. Annual energy, annual grid electricity, system load and equipment capacity have different boundaries. No chart isolates an event’s causal national energy effect.