Most outdoor sports events can be affected by adverse weather conditions in one way or another. “Rain stopped play” is a phrase familiar to followers of cricket in England, where the often unpredictable summer weather regularly interrupts a game. Tennis is similarly affected when heavy rain makes play impossible on open-air grass courts. Some sports can be played in almost all weathers (only severe snow and freezing temperatures will stop a soccer or rugby match), but the conditions can influence tactics and the outcome of the game.
The effects of weather on sport are varied, with some events unable to take place while others are changed considerably. The performance of participants can be reduced or improved, and some sporting world records are invalid if set under certain weather conditions. While outdoor sports are most affected, those played indoors can still be impacted by adverse or advantageous weather conditions.
Temperature has a significant impact on the performance of athletes. High temperature can cause various heat illnesses such as heat cramps and heat stroke, while very low temperatures may lead to hypothermia.
Some major sporting events cannot be held when the temperature is too high. When AFC selected Qatar as the host of the 2011 AFC Asian Cup they opted to run the event in the January window rather than July or August because they considered it to be “too hot in the Gulf region”. However, the also set to be held in Qatar, is scheduled for the late fall and early winter.
Some sports are cancelled because of precipitation. Some are deemed too dangerous to play when the ground is damp because of the danger of injury to a player through slipping.
When the rain is excessive an event might be canceled because of a waterlogged pitch. Winter sports can sometimes be canceled due to the amount of snow on the ground, be it too little or too much.
Wind can blow the equipment in a sporting event, changing the direction or travel of a ball. In golf the wind levels may influence the way a shot is taken.A headwind can slow runners, while they may gain wind assistance from a tailwind.Some sports rely on the presence of wind, especially surface water sports.
Some sports cannot be played if there is insufficient visibility as it can make them dangerous or can be disadvantageous to a competitor. Cricket test matches often finish when the umpire decides that the light level is too low and the timing of this can sometimes be controversial. The difficulties of playing in bad light conditions is also disputed. Some events are called off when there is heavy fog.
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